Method and apparatus for transmitting control information in radio communication system

ABSTRACT

A method for transmitting control information using PUCCH format 3 in a radio communication system includes detecting one or more Physical Downlink Control Channels (PDCCHs), receiving one or more Physical Downlink Shared Channel (PDSCH) signals corresponding to the one or more PDCCHs, and determining a PUCCH resource value n PUCCH   (3,p)  corresponding to a value of a transmit power control (TPC) field of a PDCCH for a PDSCH signal on a secondary cell (SCell) among a plurality of PUCCH resource values configured by a higher layer for the PUCCH format 3. If a single antenna port transmission mode is configured, the PUCCH resource value n PUCCH   (3,p)  indicated by the TPC field is mapped to one PUCCH resource for a single antenna port, and, if a multi-antenna port transmission mode is configured, the PUCCH resource value n PUCCH   (3,p)  indicated by the TPC field is mapped to a plurality of PUCCH resources for multiple antenna ports.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/287,961, filed Nov. 2, 2011, now U.S. Pat. No. 8,514,826, whichpursuant to 35 U.S.C. §119(a), claims the benefit of earlier filing dateand right of priority to Korean Application No. 10-2011-0103022, filedon Oct. 10, 2011, and also claims the benefit of U.S. ProvisionalApplication Ser. No. 61/409,124, filed on Nov. 2, 2010, the contents ofwhich are all incorporated by reference herein in their entirety.

DESCRIPTION

1. Technical Field

The present invention relates to a wireless communication system, andmore particularly, to a method and apparatus for transmitting controlinformation in a wireless communication system supporting carrieraggregation (CA).

2. Background Art

Wireless communication systems have been diversified in order to providevarious types of communication services such as voice or data service.In general, a wireless communication system is a multiple access systemcapable of sharing available system resources (bandwidth, transmit poweror the like) so as to support communication with multiple users.Examples of the multiple access system include a Code Division MultipleAccess (CDMA) system, a Frequency Division Multiple Access (FDMA)system, a Time Division Multiple Access (TDMA) system, an OrthogonalFrequency Division Multiple Access (OFDMA) system, a Single CarrierFrequency Division Multiple Access (SC-FDMA) system, and the like.

DISCLOSURE Technical Problem

An object of the present invention is to provide a method and apparatusfor efficiently transmitting control information in a wirelesscommunication system. Another object of the present invention is toprovide a channel format and a signal processing method and apparatusfor efficiently transmitting control information. Another object of thepresent invention is to provide a method and apparatus for efficientlyallocating resources used to transmit control information.

The technical problems solved by the present invention are not limitedto the above technical problems and those skilled in the art canunderstand other technical problems from the following description.

Technical Solution

To achieve these objects and other advantages and in accordance with thepurpose of the invention, as embodied and broadly described herein, amethod for transmitting control information using Physical UplinkControl Channel PUCCH) format 3 by a communication apparatus in a radiocommunication system, including detecting one or more Physical DownlinkControl Channels (PDCCHs), receiving one or more Physical DownlinkShared Channel (PDSCH) signals corresponding to the one or more PDCCHs,and determining a PUCCH resource value n_(PUCCH) ^((3,p)) among aplurality of PUCCH resource values configured by a higher layer for thePUCCH format 3, the PUCCH resource value n_(PUCCH) ^((3,p))corresponding to a value of a transmit power control (TPC) field of aPDCCH for a PDSCH signal on a secondary cell (SCell) according to thefollowing table, wherein, if a single antenna port transmission mode isconfigured, the PUCCH resource value n_(PUCCH) ^((3,p)) indicated by theTPC field is mapped to one PUCCH resource for a single antenna port, andwherein, if a multi-antenna port transmission mode is configured, thePUCCH resource value n_(PUCCH) ^((3,p)) indicated by the TPC field ismapped to a plurality of PUCCH resources for multiple antenna ports:

Value of TPC field n_(PUCCH) ^((3,p)) 00 First PUCCH resource valueconfigured by higher layer 01 Second PUCCH resource value configured byhigher layer 10 Third PUCCH resource value configured by higher layer 11Fourth PUCCH resource value configured by higher layer

where, p denotes an antenna port number.

In another aspect of the present invention, a communication apparatusconfigured to transmit control information using Physical Uplink ControlChannel (PUCCH) format 3 in a radio communication system, including aradio frequency (RF) unit, and a processor configured to detect one ormore Physical Downlink Control Channels (PDCCHs), receive one or morePhysical Downlink Shared Channel (PDSCH) signals corresponding to theone or more PDCCHs, and determine a PUCCH resource value n_(PUCCH)^((3,p)) among a plurality of PUCCH resource values configured by ahigher layer for the PUCCH format 3, the PUCCH resource value n_(PUCCH)^((3,p)) corresponding to a value of a transmit power control (TPC)field of a PDCCH for a PDSCH signal on a secondary cell (SCell)according to the following table, wherein, if a single antenna porttransmission mode is configured, the PUCCH resource value n_(PUCCH)^((3,p)) indicated by the TPC field is mapped to one PUCCH resource fora single antenna port, and wherein, if a multi-antenna port transmissionmode is configured, the PUCCH resource value n_(PUCCH) ^((3,p))indicated by the TPC field is mapped to a plurality of PUCCH resourcesfor multiple antenna ports:

Value of TPC field n_(PUCCH) ^((3,p)) 00 First PUCCH resource valueconfigured by higher layer 01 Second PUCCH resource value configured byhigher layer 10 Third PUCCH resource value configured by higher layer 11Fourth PUCCH resource value configured by higher layer

where, p denotes an antenna port number.

If the single antenna port transmission mode is configured, the PUCCHresource value n_(PUCCH) ^((3,p)) may be mapped to a PUCCH resourcen_(PUCCH) ^((3,p0)) for an antenna port p0, and if the multi-antennaport transmission is configured, the PUCCH resource n_(PUCCH) ^((3,p))may be mapped to a PUCCH resource n_(PUCCH) ^((3,p0)) for an antennaport p0 and a PUCCH resource n_(PUCCH) ^((3,p1)) for an antenna port p1.

A value of a TPC field of a PDCCH for a PDSCH signal on a primary cell(PCell) may be used to control transmit power for the PUCCH format 3.

If the one or more PDSCH signals include a plurality of PDSCH signals onSCells, the values of the TPC fields of a plurality of PDCCHscorresponding to a plurality of PDSCHs on the SCells may be the same.

The control information may include Hybrid Automatic Repeat reQuestAcknowledgement (HARQ-ACK) for the PDSCH signal.

The method may further include receiving allocation informationindicating a plurality of PUCCH resources for an antenna port p0, andallocation information indicating a plurality of PUCCH resources for anantenna port p1 is additionally received only when multi-antenna porttransmission is possible or when the multi-antenna port transmissionmode is configured. The higher layer includes a radio resource controllayer (RRC) layer.

The communication apparatus may transmit the control information usingone or more PUCCH resources to which the PUCCH resource value n_(PUCCH)^((3,p)) is mapped.

Advantageous Effects

According to the present invention, it is possible to efficientlytransmit control information in a wireless communication system. Inaddition, it is possible to provide a channel format and a signalprocessing method for efficiently transmitting control information. Inaddition, it is possible to efficiently allocate resources used totransmit control information.

The effects of the present invention are not limited to theabove-described effects and those skilled in the art can understandother effects from the following description.

DESCRIPTION OF DRAWINGS

The accompanying drawings which are included as a portion of thedetailed description in order to help understanding of the presentinvention provide embodiments of the present invention and describestechnical mapping of the present invention along with the detaileddescription.

FIG. 1 is a view showing physical channels used for a 3^(rd) GenerationPartnership Project (3GPP) Long Term Evolution (LTE) system, which is anexample of a wireless communication system, and a general signaltransmission method using the same.

FIG. 2 is a diagram showing a structure of a radio frame.

FIG. 3A is a diagram showing an uplink signal processing procedure.

FIG. 3B is a diagram showing a downlink signal processing procedure.

FIG. 4 is a diagram showing a Single Carrier Frequency Division MultipleAccess (SC-FDMA) scheme and an Orthogonal Frequency Division MultipleAccess (OFDMA) scheme.

FIG. 5 is a diagram showing a signal mapping scheme on a frequencydomain satisfying a single carrier property.

FIG. 6 is a diagram showing a signal processing procedure of mapping DFTprocess output samples to a single carrier in a clustered SC-FDMA.

FIGS. 7 and 8 are diagrams showing a signal processing procedure ofmapping DFT process output samples to multiple carriers in a clusteredSC-FDMA scheme.

FIG. 9 is a diagram showing a signal processing procedure in a segmentedSC-FDMA scheme.

FIG. 10 is a diagram showing the structure of an uplink subframe.

FIG. 11 is a diagram showing a signal processing procedure oftransmitting a reference signal (RS) in the uplink.

FIGS. 12A and 12B are diagrams each showing a demodulation referencesignal (DMRS) for a physical uplink shared channel (PUSCH).

FIGS. 13 to 14 are diagrams showing slot level structures of physicaluplink control channel (PUCCH) formats 1a and 1b.

FIGS. 15 and 16 are diagrams showing slot level structures of PUCCHformats 2/2a/2b.

FIG. 17 is a diagram showing ACK/NACK channelization of PUCCH formats 1aand 1b.

FIG. 18 is a diagram showing channelization of a structure in whichPUCCH formats 1/1a/1b and formats 2/2a/2b are mixed within the same PRB.

FIG. 19 is a diagram showing allocation of a PRB used to transmit aPUCCH.

FIG. 20 is a conceptual diagram of management of a downlink componentcarrier in a base station (BS).

FIG. 21 is a conceptual diagram of management of an uplink componentcarrier in a user equipment (UE).

FIG. 22 is a conceptual diagram of the case where one MAC layer managesmultiple carriers in a BS.

FIG. 23 is a conceptual diagram of the case where one MAC layer managesmultiple carriers in a UE.

FIG. 24 is a conceptual diagram of the case where one MAC layer managesmultiple carriers in a BS.

FIG. 25 is a conceptual diagram of the case where a plurality of MAClayers manages multiple carriers in a UE.

FIG. 26 is a conceptual diagram of the case where a plurality of MAClayers manages multiple carriers in a BS.

FIG. 27 is a conceptual diagram of the case where one or more MAC layersmanage multiple carriers in view of reception of a UE.

FIG. 28 is a diagram showing asymmetric carrier aggregation (CA) inwhich a plurality of downlink (DL) component carriers (CCs) and anuplink (UL) CC are linked.

FIGS. 29A to 29F are diagrams showing a structure of PUCCH format 3 anda signal processing procedure therefor.

FIGS. 30 to 31 are diagrams showing a PUCCH format with an increased RSmultiplexing capacity and a signal processing procedure according to anembodiment of the present invention.

FIG. 32 is a diagram showing a signal processing block/procedure forSORTD.

FIG. 33 is a diagram illustrating an SORTD operation.

FIG. 34 is a diagram showing a BS and a UE applicable to the presentinvention.

MODE FOR INVENTION

The following technologies may be utilized in various radio accesssystems such as a Code Division Multiple Access (CDMA) system, aFrequency Division Multiple Access (FDMA) system, a Time DivisionMultiple Access (TDMA) system, an Orthogonal Frequency Division MultipleAccess (OFDMA) system, or a Single Carrier Frequency Division MultipleAccess (SC-FDMA) system. The CDMA system may be implemented as radiotechnology such as Universal Terrestrial Radio Access (UTRA) orCDMA2000. The TDMA system may be implemented as radio technology such asGlobal System for Mobile communications (GSM)/General Packet RadioService (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE). The OFDMAsystem may be implemented as radio technology such as IEEE 802.11(Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20 or E-UTRA (Evolved UTRA). TheUTRA system is part of the Universal Mobile Telecommunications System(UMTS). A 3^(rd) Generation Partnership Project Long Term Evolution(3GPP LTE) communication system is part of the E-UMTS (Evolved UMTS),which employs an OFDMA system in downlink and employs an SC-FDMA systemin uplink. LTE-A (Advanced) is an evolved version of 3GPP LTE. In orderto clarify the description, the 3GPP LTE/LTE-A will be focused upon, butthe technical scope of the present invention is not limited thereto.

In a radio communication system, a user equipment (UE) receivesinformation from a base station (BS) in the downlink (DL) and transmitsinformation to the BS in the uplink (UL). Information transmitted andreceived between the BS and the UE includes data and a variety ofcontrol information and various physical channels are present accordingto the kind/usage of the transmitted and received information.

FIG. 1 is a view showing physical channels used for a 3^(rd) GenerationPartnership Project (3GPP) Long Term Evolution (LTE) system and ageneral signal transmission method using the same.

When a UE is powered on or when the UE newly enters a cell, the UEperforms an initial cell search operation such as synchronization with aBS in step S101. For the initial cell search operation, the UE mayreceive a Primary Synchronization Channel (P-SCH) and a SecondarySynchronization Channel (S-SCH) from the BS so as to performsynchronization with the BS, and acquire information such as a cell ID.Thereafter, the UE may receive a physical broadcast channel from the BSand acquire broadcast information in the cell. Meanwhile, the UE mayreceive a Downlink Reference signal (DL RS) in the initial cell searchstep and confirm a downlink channel state.

The UE which completes the initial cell search may receive a PhysicalDownlink Control Channel (PDCCH) and a Physical Downlink Shared Channel(PDSCH) corresponding to the PDCCH, and acquire more detailed systeminformation in step S102.

Thereafter, the UE may perform a random access procedure in steps S103to S106, in order to complete the access to the eNB. For the randomaccess procedure, the UE may transmit a preamble via a Physical RandomAccess Channel (PRACH) (S103), and may receive a message in response tothe preamble via the PDCCH and the PDSCH corresponding thereto (S104).In contention-based random access, a contention resolution procedureincluding the transmission of an additional PRACH (S105) and thereception of the PDCCH and the PDSCH corresponding thereto (S106) may beperformed.

The UE which performs the above-described procedure may then receive thePDCCH/PDSCH (S107) and transmit a Physical Uplink Shared Channel(PUSCH)/Physical Uplink Control Channel (PUCCH) (S108), as a generaluplink/downlink signal transmission procedure. Control informationtransmitted from the UE to the BS is collectively referred to as uplinkcontrol information (UCI). The UCI includes hybrid automatic repeat andrequest acknowledgement/negative-acknowledgement (HARQ ACK/NACK),scheduling request (SR), channel quality indication (CQI), precodingmatrix indication (PMI), rank indication (RI), etc. In the presentspecification, HARQ ACK/NACK is briefly referred to as HARQ-ACK orACK/NACK (A/N). HARQ-ACK includes at least one of a positive ACK (ACK),a negative NACK (ACK), DTX and NACK/DTX The UCI is generally transmittedvia a PUCCH. However, in the case where control information and trafficdata are simultaneously transmitted, the UCI may be transmitted via aPUSCH. The UCI may be aperiodically transmitted via a PUSCH according toa network request/instruction.

FIG. 2 is a diagram showing the structure of a radio frame. In acellular OFDM radio packet communication system, uplink/downlink datapacket transmission is performed in subframe units and one subframe isdefined as a predetermined duration including a plurality of OFDMsymbols. The 3GPP LTE standard supports a type-1 radio frame structureapplicable to frequency division duplex (FDD) and a type-2 radio framestructure applicable to time division duplex (TDD).

FIG. 2( a) shows the structure of the type-1 radio frame. A downlinkradio frame includes 10 subframes and one subframe includes two slots ina time domain. A time required to transmit one subframe is referred toas a transmission time interval (TTI). For example, one subframe has alength of 1 ms and one slot has a length of 0. ms. On e slot includes aplurality of OFDM symbols in a time domain and includes a plurality ofresource blocks (RBs) in a frequency domain. In the 3GPP LTE system,since OFDMA is used in the downlink, an OFDM symbol indicates one symbolpart. The OFDM symbol may be referred to as an SC-FDMA symbol or symbolpart. A RB as a resource allocation unit may include a plurality ofconsecutive subcarriers in one slot.

The number of OFDM symbols included in one slot may be changed accordingto the configuration of cyclic prefix (CP). CP includes an extended CPand a normal CP. For example, if OFDM symbols are configured by thenormal CP, the number of OFDM symbols included in one slot may be 7. IfOFDM symbols are configured by the extended CP, since the length of oneOFDM symbol is increased, the number of OFDM symbols included in oneslot is less than the number of OFDM symbols in case of the normal CP.In case of the extended CP, for example, the number of OFDM symbolsincluded in one slot may be 6. In the case where a channel state isunstable, such as the case where a UE moves at a high speed, theextended CP may be used in order to further reduce inter-symbolinterference.

In case of using the normal CP, since one slot includes seven OFDMsymbols, one subframe includes 14 OFDM symbols. At this time, a maximumof three first OFDM symbols of each subframe may be allocated to aphysical downlink control channel (PDCCH) and the remaining OFDM symbolsmay be allocated to a physical downlink shared channel (PDSCH).

FIG. 2( b) shows the structure of the type-2 radio frame. The type-2radio frame includes two half frames and each half frame includes fivesubframes, a downlink pilot time slot (DwPTS), a guard period (GP) andan uplink pilot time slot (UpPTS). From among these, one subframeincludes two slots. The DwPTS is used for initial cell search,synchronization or channel estimation of a UE. The UpPTS is used forchannel estimation of a BS and uplink transmission synchronization of aUE. The GP is used to eliminate interference generated in the uplink dueto multi-path delay of a downlink signal between the uplink and thedownlink.

The structure of the radio frame is only exemplary and the number ofsubframes included in the radio frame, the number of slots included inthe subframe, or the number of symbols included in the slot may bevariously changed.

FIG. 3A is a view explaining a signal processing procedure oftransmitting an uplink (UL) signal at a UE.

In order to transmit the UL signal, a scrambling module 201 of the UEmay scramble a transmitted signal using a UE-specific scrambling signal.The scrambled signal is input to a modulation mapper 202 so as to bemodulated into complex symbols by a Binary Phase Shift Keying (BPSK),Quadrature Phase Shift Keying (QPSK), 16-Quadrature amplitude modulation(QAM) or 64-QAM scheme according to the kind of the transmitted signaland/or the channel state. Thereafter, the modulated complex symbols areprocessed by a transform precoder 203 and are input to a resourceelement mapper 204. The resource element mapper 204 may map the complexsymbols to time-frequency resource elements. The processed signal may betransmitted to the BS via an SC-FDMA signal generator 205 and anantenna.

FIG. 3B is a diagram explaining a signal processing procedure oftransmitting a downlink (DL) signal at a BS.

In a 3GPP LTE system, the BS may transmit one or more codewords in thedownlink. Accordingly, one or more codewords may be processed toconfigure complex symbols by scrambling modules 301 and modulationmappers 302, similar to the UL transmission of FIG. 3A. Thereafter, thecomplex symbols are mapped to a plurality of layers by a layer mapper303, and each layer may be multiplied by a precoding matrix by aprecoding module 304 and may be allocated to each transmission antenna.The processed signals which will respectively be transmitted viaantennas may be mapped to time-frequency resource elements by resourceelement mappers 305, and may respectively be transmitted via OFDM signalgenerators 306 and antennas.

In a radio communication system, in a case where a UE transmits a signalin the uplink, a Peak-to-Average Ratio (PAPR) may be more problematicthan the case where a BS transmits a signal in the downlink.Accordingly, as described above with reference to FIGS. 3A and 3B, anOFDMA scheme is used to transmit a downlink signal, while an SC-FDMAscheme is used to transmit an uplink signal.

FIG. 4 is a diagram explaining an SC-FDMA scheme and an OFDMA scheme. Inthe 3GPP system, the OFDMA scheme is used in the downlink and theSC-FDMA is used in the uplink.

Referring to FIG. 4, a UE for UL signal transmission and a BS for DLsignal transmission are identical in that a serial-to-parallel converter401, a subcarrier mapper 403, an M-point Inverse Discrete FourierTransform (IDFT) module 404, parallel-to-serial converter 405 and aCyclic Prefix (CP) adding module 406 are included. The UE fortransmitting a signal using an SC-FDMA scheme further includes anN-point DFT module 402. The N-point DFT module 402 partially offsets anIDFT process influence of the M-point IDFT module 404 such that thetransmitted signal has a single carrier property.

FIG. 5 is a diagram explaining a signal mapping scheme in a frequencydomain satisfying the single carrier property in the frequency domain.FIG. 5( a) shows a localized mapping scheme and FIG. 5( b) shows adistributed mapping scheme.

A clustered SC-FDMA scheme which is a modified form of the SC-FDMAscheme will now be described. In the clustered SC-FDMA scheme, DFTprocess output samples are divided into sub-groups in a subcarriermapping process and are non-contiguously mapped in the frequency domain(or subcarrier domain).

FIG. 6 is a diagram showing a signal processing procedure in which DFTprocess output samples are mapped to a single carrier in a clusteredSC-FDMA scheme. FIGS. 7 and 8 are diagrams showing a signal processingprocedure in which DFT process output samples are mapped to multiplecarriers in a clustered SC-FDMA scheme. FIG. 6 shows an example ofapplying an intra-carrier clustered SC-FDMA scheme and FIGS. 7 and 8show examples of applying an inter-carrier clustered SC-FDMA scheme.FIG. 7 shows the case where a subcarrier spacing between contiguouscomponent carriers is configured and a signal is generated by a singleIFFT block in a state in which component carriers are contiguouslyallocated in a frequency domain and FIG. 8 shows the case where a signalis generated by a plurality of IFFT blocks in a state in which componentcarriers are non-contiguously allocated in a frequency domain.

FIG. 9 is a diagram showing a signal processing procedure in a segmentedSC-FDMA scheme.

In the segmented SC-FDMA scheme, IFFTs corresponding in number to acertain number of DFTs are applied such that the DFTs and the IFFTs arein one-to-one correspondence and DFT spreading of the conventionalSC-FDMA scheme and the frequency subcarrier mapping configuration of theIFFTs are extended. Therefore, the segmented SC-FDMA scheme alsoreferred to as an NxSC-FDMA or NxDFT-s-OFDMA scheme. In the presentspecification, the generic term “segmented SC-FDMA” is used. Referringto FIG. 9, the segmented SC-FDMA scheme is characterized in thatmodulation symbols of an entire time domain are grouped into N (N is aninteger greater than 1) groups and a DFT process is performed on a groupunit basis, in order to relax a single carrier property.

FIG. 10 is a diagram showing the structure of a UL subframe.

Referring to FIG. 10, the UL subframe includes a plurality of slots(e.g., two). Each slot may include SC-FDMA symbols, the number of whichvaries according to the length of a CP. For example, in the case of anormal CP, a slot may include seven SC-FDMA symbols. A UL subframe isdivided into a data region and a control region. The data regionincludes a PUSCH and is used to transmit a data signal such as voice.The control region includes a PUCCH and is used to transmit controlinformation. The PUCCH includes an RB pair (e.g., m=0, 1, 2, 3) (e.g.,an RB pair of frequency-mirrored locations) located at both ends of thedata region on the frequency axis and hops between slots. The UL controlinformation (that is, UCI) includes HARQ ACK/NACK, Channel QualityInformation (CQI), Precoding Matrix Indicator (PMI) Rank Indication(RI), etc.

FIG. 11 is a diagram illustrating a signal processing procedure fortransmitting a Reference Signal (RS) in the uplink. Data is transformedinto a frequency domain signal by a DFT precoder, subjected to frequencymapping and IFFT, and transmitted. In contrast, an RS does not passthrough a DFT precoder. More specifically, an RS sequence is directlygenerated in a frequency domain (step 11), subjected to alocalized-mapping process (step 12), subjected to IFFT (step 13),subjected to a CP attachment process (step 14), and transmitted.

The RS sequence r_(u,v) ^((α))(n) is defined by cyclic shift a of a basesequence and may be expressed by Equation 1.

r _(u,v) ^((α))(n)=e ^(jαn) r _(u,v)(n),0≦n<M _(sc) ^(RS)  Equation 1

where, M_(sc) ^(RS)=mN_(sc) ^(RB) denotes the length of the RS sequence,N_(sc) ^(RB) denotes the size of a resource block represented insubcarrier units, and m is 1≦m≦N_(RB) ^(max,UL). N_(RB) ^(max,UL) RBdenotes a maximum UL transmission band.

A base sequence r _(u,v)(n) is grouped into several groups. u ε{0, 1, .. . ,29} denotes a group number, and v corresponds to a base sequencenumber in a corresponding group. Each group includes one base sequenceν=0 with a length of M_(sc) ^(RS)=mN_(sc) ^(RB) (1≦m≦5) and two basesequences ν=0,1 with a length of M_(sc) ^(RS)=mN_(sc) ^(RB) (6≦m≦N_(RB)^(max,UL)). The sequence group number u and the number v within acorresponding group may be changed with time. Definition of the basesequence r _(u,v)(0), . . . , r _(u,v)(M_(sc) ^(RS)−1) follows asequence length M_(sc) ^(RS).

The base sequence having a length of 3N_(sc) ^(RB) or more may bedefined as follows.

With respect to M_(sc) ^(RS)≧3N_(sc) ^(RB), the base sequence r_(u,v)(0), . . . , r _(u,v)(M_(sc) ^(RS)−1) is given by the followingEquation 2.

r _(u,v)(n)=x _(q)(n mod N _(ZC) ^(RS)),0≦n<M _(sc) ^(RS)  Equation 2

where, a q-th root Zadoff-Chu sequence may be defined by the followingEquation 3.

$\begin{matrix}{{{x_{q}(m)} = ^{{- j}\frac{\pi \; {{qm}{({m + 1})}}}{N_{ZC}^{RS}}}},{0 \leq m \leq {N_{ZC}^{RS} - 1}}} & {{Equation}\mspace{14mu} 3}\end{matrix}$

where, q satisfies the following equation 4.

q=└ q+½┘+ν·(−1)^(└2 q┘)

q=N _(ZC) ^(RS)·(u+1)/31  Equation 4

where, the length N_(ZC) ^(RS) of the Zadoff-Chu sequence is given by alargest prime number and thus N_(ZC) ^(RS)<M_(sc) ^(RS) is satisfied.

A base sequence having a length of less than 3N_(sc) ^(RB) may bedefined as follows. First, with respect to M_(sc) ^(RS)=N_(sc) ^(RB) andM_(sc) ^(RS)=2N_(sc) ^(RB), the base sequence is given as shown inEquation 5.

r _(u,v)(n)=e ^(jφ(n)π/4),0≦n≦M _(sc) ^(RS)−1  Equation 5

where, values φ(n) for M_(sc) ^(RS)=N_(sc) ^(RB) and M_(sc)^(RS)=2N_(sc) ^(RB) are given by the following Table 1, respectively.

TABLE 1 u φ(0), . . . , φ(11) 0 −1 1 3 −3 3 3 1 1 3 1 −3 3 1 1 1 3 3 3−1 1 −3 −3 1 −3 3 2 1 1 −3 −3 −3 −1 −3 −3 1 −3 1 −1 3 −1 1 1 1 1 −1 −3−3 1 −3 3 −1 4 −1 3 1 −1 1 −1 −3 −1 1 −1 1 3 5 1 −3 3 −1 −1 1 1 −1 −1 3−3 1 6 −1 3 −3 −3 −3 3 1 −1 3 3 −3 1 7 −3 −1 −1 −1 1 −3 3 −1 1 −3 3 1 81 −3 3 1 −1 −1 −1 1 1 3 −1 1 9 1 −3 −1 3 3 −1 −3 1 1 1 1 1 10 −1 3 −1 11 −3 −3 −1 −3 −3 3 −1 11 3 1 −1 −1 3 3 −3 1 3 1 3 3 12 1 −3 1 1 −3 1 1 1−3 −3 −3 1 13 3 3 −3 3 −3 1 1 3 −1 −3 3 3 14 −3 1 −1 −3 −1 3 1 3 3 3 −11 15 3 −1 1 −3 −1 −1 1 1 3 1 −1 −3 16 1 3 1 −1 1 3 3 3 −1 −1 3 −1 17 −31 1 3 −3 3 −3 −3 3 1 3 −1 18 −3 3 1 1 −3 1 −3 −3 −1 −1 1 −3 19 −1 3 1 31 −1 −1 3 −3 −1 −3 −1 20 −1 −3 1 1 1 1 3 1 −1 1 −3 −1 21 −1 3 −1 1 −3 −3−3 −3 −3 1 −1 −3 22 1 1 −3 −3 −3 −3 −1 3 −3 1 −3 3 23 1 1 −1 −3 −1 −3 1−1 1 3 −1 1 24 1 1 3 1 3 3 −1 1 −1 −3 −3 1 25 1 −3 3 3 1 3 3 1 −3 −1 −13 26 1 3 −3 −3 3 −3 1 −1 −1 3 −1 −3 27 −3 −1 −3 −1 −3 3 1 −1 1 3 −3 −328 −1 3 −3 3 −1 3 3 −3 3 3 −1 −1 29 3 −3 −3 −1 −1 −3 −1 3 −3 3 1 −1

TABLE 2 u φ(0), . . . , φ(23) 0 −1 3 1 −3 3 −1 1 3 −3 3 1 3 −3 3 1 1 −11 3 −3 3 −3 −1 −3 1 −3 3 −3 −3 −3 1 −3 −3 3 −1 1 1 1 3 1 −1 3 −3 −3 1 31 1 −3 2 3 −1 3 3 1 1 −3 3 3 3 3 1 −1 3 −1 1 1 −1 −3 −1 −1 1 3 3 3 −1 −31 1 3 −3 1 1 −3 −1 −1 1 3 1 3 1 −1 3 1 1 −3 −1 −3 −1 4 −1 −1 −1 −3 −3 −11 1 3 3 −1 3 −1 1 −1 −3 1 −1 −3 −3 1 −3 −1 −1 5 −3 1 1 3 −1 1 3 1 −3 1−3 1 1 −1 −1 3 −1 −3 3 −3 −3 −3 1 1 6 1 1 −1 −1 3 −3 −3 3 −3 1 −1 −1 1−1 1 1 −1 −3 −1 1 −1 3 −1 −3 7 −3 3 3 −1 −1 −3 −1 3 1 3 1 3 1 1 −1 3 1−1 1 3 −3 −1 −1 1 8 −3 1 3 −3 1 −1 −3 3 −3 3 −1 −1 −1 −1 1 −3 −3 −3 1 −3−3 −3 1 −3 9 1 1 −3 3 3 −1 −3 −1 3 −3 3 3 3 −1 1 1 −3 1 −1 1 1 −3 1 1 10−1 1 −3 −3 3 −1 3 −1 −1 −3 −3 −3 −1 −3 −3 1 −1 1 3 3 −1 1 −1 3 11 1 3 3−3 −3 1 3 1 −1 −3 −3 −3 3 3 −3 3 3 −1 −3 3 −1 1 −3 1 12 1 3 3 1 1 1 −1−1 1 −3 3 −1 1 1 −3 3 3 −1 −3 3 −3 −1 −3 −1 13 3 −1 −1 −1 −1 −3 −1 3 3 1−1 1 3 3 3 −1 1 1 −3 1 3 −1 −3 3 14 −3 −3 3 1 3 1 −3 3 1 3 1 1 3 3 −1 −1−3 1 −3 −1 3 1 1 3 15 −1 −1 1 −3 1 3 −3 1 −1 −3 −1 3 1 3 1 −1 −3 −3 −1−1 −3 −3 −3 −1 16 −1 −3 3 −1 −1 −1 −1 1 1 −3 3 1 3 3 1 −1 1 −3 1 −3 1 1−3 −1 17 1 3 −1 3 3 −1 −3 1 −1 −3 3 3 3 −1 1 1 3 −1 −3 −1 3 −1 −1 −1 181 1 1 1 1 −1 3 −1 −3 1 1 3 −3 1 −3 −1 1 1 −3 −3 3 1 1 −3 19 1 3 3 1 −1−3 3 −1 3 3 3 −3 1 −1 1 −1 −3 −1 1 3 −1 3 −3 −3 20 −1 −3 3 −3 −3 −3 −1−1 −3 −1 −3 3 1 3 −3 −1 3 −1 1 −1 3 −3 1 −1 21 −3 −3 1 1 −1 1 −1 1 −1 31 −3 −1 1 −1 1 −1 −1 3 3 −3 −1 1 −3 22 −3 −1 −3 3 1 −1 −3 −1 −3 −3 3 −33 −3 −1 1 3 1 −3 1 3 3 −1 −3 23 −1 −1 −1 −1 3 3 3 1 3 3 −3 1 3 −1 3 −1 33 −3 3 1 −1 3 3 24 1 −1 3 3 −1 −3 3 −3 −1 −1 3 −1 3 −1 −1 1 1 1 1 −1 −1−3 −1 3 25 1 −1 1 −1 3 −1 3 1 1 −1 −1 −3 1 1 −3 1 3 −3 1 1 −3 −3 −1 −126 −3 −1 1 3 1 1 −3 −1 −1 −3 3 −3 3 1 −3 3 −3 1 −1 1 −3 1 1 1 27 −1 −3 33 1 1 3 −1 −3 −1 −1 −1 3 1 −3 −3 −1 3 −3 −1 −3 −1 −3 −1 28 −1 −3 −1 −1 1−3 −1 −1 1 −1 −3 1 1 −3 1 −3 −3 3 1 1 −1 3 −1 −1 29 1 1 −1 −1 −3 −1 3 −13 −1 1 3 1 −1 3 1 3 −3 −3 1 −1 −1 1 3

RS hopping will now be described.

The sequence group number u in a slot n_(s) may be defined as shown inthe following Equation 6 by a group hopping pattern f_(gh)(n_(s)) and asequence shift pattern f_(ss).

u=(f _(gh)(n _(s))+f _(ss))mod 30  Equation 6

where, mod denotes a modulo operation.

17 different hopping patterns and 30 different sequence shift patternsare present. Sequence group hopping may be enabled or disabled by aparameter for activating group hopping provided by a higher layer.

A PUCCH and a PUSCH may have the same hopping pattern, but havedifferent sequence shift patterns.

The group hopping pattern f_(gh)(n_(s)) is the same in the PUSCH and thePUCCH and is given by the following Equation 7.

$\begin{matrix}{{f_{gh}\left( n_{s} \right)} = \left\{ \begin{matrix}0 & {{if}\mspace{14mu} {group}\mspace{14mu} {hopping}\mspace{14mu} {is}\mspace{14mu} {disabled}} \\{\left( {\sum\limits_{i = 0}^{7}{{c\left( {{8n_{s}} + i} \right)} \cdot 2^{i}}} \right){mod}\; 30} & {{if}\mspace{14mu} {group}\mspace{14mu} {hopping}\mspace{14mu} {is}\mspace{14mu} {enabled}}\end{matrix} \right.} & {{Equation}\mspace{14mu} 7}\end{matrix}$

where, c(i) denotes a pseudo-random sequence and a pseudo-randomsequence generator may be initialized by

$c_{init} = \left\lfloor \frac{N_{ID}^{cell}}{30} \right\rfloor$

at the start of each radio frame.

The PUCCH and the PUSCH are different in definition of the sequenceshift pattern f_(ss).

The sequence shift pattern f_(ss) ^(PUCCH) of the PUCCH is f_(ss)^(PUCCH)=N_(ID) ^(cell) mod 30 and the sequence shift pattern f_(ss)^(PUSCH) of the PUSCH is f_(ss) ^(PUSCH)=(f_(ss) ^(PUCCH)+Δ_(ss))mod 30.Δ_(ss)ε{0, 1, . . . , 29} is configured by a higher layer.

Hereinafter, sequence hopping will be described.

Sequence hopping is applied only to a RS having a length of M_(sc)^(RS)≧6N_(sc) ^(RB).

With respect to an RS having a length of M_(sc) ^(RS)<6N_(sc) ^(RB) abase sequence number v within a base sequence group is v=0.

With respect to an RS having a length of M_(sc) ^(RS)≧6N_(sc) ^(RB), abase sequence number v within a base sequence group in a slot n_(s) isgiven by the following Equation 8.

$\begin{matrix}{v = \left\{ \begin{matrix}{c\left( n_{s} \right)} & \begin{matrix}{{if}\mspace{14mu} {group}\mspace{14mu} {hopping}\mspace{14mu} {is}\mspace{14mu} {disabled}\mspace{14mu} {and}} \\{{sequence}\mspace{20mu} {hopping}\mspace{14mu} {is}\mspace{14mu} {enabled}}\end{matrix} \\0 & {otherwise}\end{matrix} \right.} & {{Equation}\mspace{14mu} 8}\end{matrix}$

where, c(i) denotes a pseudo-random sequence and a parameter forenabling sequence hopping provided by a higher layer determines whethersequence hopping is enabled. The pseudo-random sequence generator may beinitialized by

$c_{init} = {{\left\lfloor \frac{N_{ID}^{cell}}{30} \right\rfloor \cdot 2^{5}} + f_{ss}^{PUSCH}}$

at the start of a radio frame.

An RS for a PUSCH is determined as follows.

The RS sequence r^(PUSCH)(.) for the PUCCH is defined by

r^(PUSCH)(m ⋅ M_(sc)^(RS) + n) = r_(u, v)^((α))(n).

m and n satisfy

m = 0, 1 n = 0, …  , M_(sc)^(RS) − 1

and satisfy M_(sc) ^(RS)=M_(sc) ^(PUSCH).

In one slot, cyclic shift is α=2 n_(cs)/12 along with n_(cs)=(n_(DMRS)⁽¹⁾+n_(DMRS) ⁽²⁾+n_(PRS)(n_(s)))mod 12.

n_(DMRS) ⁽¹⁾ is a broadcast value, n_(DMRS) ⁽²⁾ is given by ULscheduling allocation, and n_(PRS)(n_(s)) is a cell-specific cyclicshift value. n_(PRS)(n_(s)) varies according to a slot number n_(s), andis n_(PRS)(n_(s))=Σ_(i=0) ⁷c(8·n_(s)+i)·2^(i).

c(i) is a pseudo-random sequence and c(i) is a cell-specific value. Thepseudo-random sequence generator may be initialized by

$c_{init} = {{\left\lfloor \frac{N_{ID}^{cell}}{30} \right\rfloor \cdot 2^{5}} + f_{ss}^{PUSCH}}$

at the start of a radio frame.

Table 3 shows a cyclic shift field and n_(DMRS) ⁽²⁾ at a downlinkcontrol information (DCI) format 0.

TABLE 3 Cyclic shift field at DCI format 0 n_(DMRS) ⁽²⁾ 000 0 001 2 0103 011 4 100 6 101 8 110 9 111 10

A physical mapping method for a UL RS at a PUSCH is as follows.

A sequence is multiplied by an amplitude scaling factor β_(PUSCH) and ismapped to the same set of a physical resource block (PRB) used for thecorresponding PUSCH within the sequence started at r^(PUSCH)(0). l=3 fora normal CP and l=2 for an extended CP. When the sequence is mapped to aresource element (k,l) within a subframe, the order of k is firstincreased and the slot number is then increased.

In summary, if a length is greater than and equal to 3N_(sc) ^(RB), a ZCsequence is used along with cyclic extension. If a length is less than3N_(sc) ^(RB), a computer-generated sequence is used. Cyclic shift isdetermined according to cell-specific cyclic shift, UE-specific cyclicshift and hopping pattern.

FIG. 12A is a diagram showing the structure of a demodulation referencesignal (DMRS) for a PUSCH in the case of normal CP and FIG. 12B is adiagram showing the structure of a DMRS for a PUSCH in the case ofextended CP. In FIG. 12A, a DMRS is transmitted via fourth and eleventhSC-FDMA symbols and, in FIG. 12B, a DMRS is transmitted via third andninth SC-FDMA symbols.

FIGS. 13 to 16 show a slot level structure of a PUCCH format. The PUCCHincludes the following formats in order to transmit control information.

(1) Format 1: This is used for on-off keying (OOK) modulation andscheduling request (SR)

(2) Format 1a and Format 1b: They are used for ACK/NACK transmission

1) Format 1a: BPSK ACK/NACK for one codeword

2) Format 1b: QPSK ACK/NACK for two codewords

(3) Format 2: This is used for QPSK modulation and CQI transmission

(4) Format 2a and Format 2b: They are used for CQI and ACK/NACKsimultaneous transmission.

Table 4 shows a modulation scheme and the number of bits per subframeaccording to a PUCCH format. Table 5 shows the number of RSs per slotaccording to a PUCCH format. Table 6 shows SC-FDMA symbol locations ofan RS according to a PUCCH format. In Table 4, the PUCCH formats 2a and2b correspond to the normal CP case.

TABLE 4 Modulation Number of bits per subframe, PUCCH format schemeM_(bit) 1 N/A N/A 1a BPSK 1 1b QPSK 2 2 QPSK 20 2a QPSK + BPSK 21 2bQPSK + BPSK 22

TABLE 5 PUCCH format Normal CP Extended CP 1, 1a, 1b 3 2 2 2 1 2a, 2b 2N/A

TABLE 6 SC-FDMA symbol location of RS PUCCH format Normal CP Extended CP1, 1a, 1b 2, 3, 4 2, 3 2, 2a, 2b 1, 5 3

FIG. 13 shows PUCCH formats 1a and 1b in the normal CP case. FIG. 14shows PUCCH formats 1a and 1b in the extended CP case. In the PUCCHformats 1a and 1b, the same control information is repeated within asubframe in slot units. Each UE transmits an ACK/NACK signal throughdifferent resources including different cyclic shifts (CSs) (frequencydomain codes) of a computer-generated constant amplitude zero autocorrelation (CG-CAZAC) sequence and orthogonal covers (OCs) ororthogonal cover codes (OCCs) (time domain codes). The OC includes, forexample, a Walsh/DFT orthogonal code. If the number of CSs is 6 and thenumber of OCs is 3, a total of 18 UEs may be multiplexed in the samephysical resource block (PRB) in the case of using a single antenna.Orthogonal sequences w0, w1, w2 and w3 may be applied in a certain timedomain (after FFT modulation) or a certain frequency domain (before FFTmodulation).

For SR and persistent scheduling, ACK/NACK resources including CSs, OCsand PRBs may be provided to a UE through radio resource control (RRC).For dynamic ACK/NACK and non-persistent scheduling, ACK/NACK resourcesmay be implicitly provided to the UE by a lowest CCE index of a PDCCHcorresponding to a PDSCH.

FIG. 15 shows a PUCCH format 2/2a/2b in the normal CP case. FIG. 16shows a PUCCH format 2/2a/2b in the extended CP case. Referring to FIGS.15 and 16, one subframe includes 10 QPSK data symbols in addition to anRS symbol in the normal CP case. Each QPSK symbol is spread in afrequency domain by a CS and is then mapped to a corresponding SC-FDMAsymbol. SC-FDMA symbol level CS hopping may be applied in order torandomize inter-cell interference. RSs may be multiplexed by CDM using aCS. For example, if it is assumed that the number of available CSs is 12or 6, 12 or 6 UEs may be multiplexed in the same PRB. For example, inthe PUCCH formats 1/1a/1b and 2/2a/2b, a plurality of UEs may bemultiplexed by CS+OC+PRB and CS+PRB.

Length-4 and length-3 OCs for PUCCH formats 1/1a/1b are shown in thefollowing Tables 7 and 8.

TABLE 7 Length-4 orthogonal sequences for PUCCH formats 1/1a/1b Sequenceindex Orthogonal sequences n_(oc) (n_(s)) [w(0) . . . w(N_(SF) ^(PUCCH)− 1)] 0 [+1 +1 +1 +1] 1 [+1 −1 +1 −1] 2 [+1 −1 −1 +1]

TABLE 8 Length-3 orthogonal sequences for PUCCH formats 1/1a/1b Sequenceindex Orthogonal sequences n_(oc) (n_(s)) [w(0) . . . w(N_(SF) ^(PUCCH)− 1)] 0 [1 1 1] 1 [1 e^(j2π/3) e^(j4π/3)] 2 [1 e^(j4π/3) e^(j2π/3)]

The OCs for the RS in the PUCCH formats 1/1a/1b is shown in Table 9.

TABLE 9 1a and 1b Sequence index n_(oc) (n_(s)) Normal cyclic prefixExtended cyclic prefix 0 [1 1 1] [1 1] 1 [1 e^(j2π/3) e^(j4π/3)] [1 −1]2 [1 e^(j4π/3) e^(j2π/3)] N/A

FIG. 17 is a diagram explaining ACK/NACK channelization for the PUCCHformats 1a and 1b. FIG. 17 shows the case of Δ_(shift) ^(PUCCH)=2.

FIG. 18 is a diagram showing channelization of a structure in whichPUCCH formats 1/1a/1b and formats 2/2a/2b are mixed within the same PRB.

CS hopping and OC remapping may be applied as follows.

(1) Symbol-Based Cell-Specific CS Hopping for Inter-Cell InterferenceRandomization

(2) Slot Level CS/OC Remapping

1) for Inter-Cell Interference Randomization

2) Slot-Based Access for Mapping Between ACK/NACK Channels and Resourcesk

Resource n_(r) for the PUCCH format 1/1a/1b includes the followingcombination.

(1) CS (=DFT OC in a symbol level) (n_(cs))

(2) OC (OC in a slot level) (n_(oc))

(3) frequency RB (n_(rb))

When indexes representing the CS, the OC and the RB are respectivelyn_(cs), n_(oc) and n_(rb), a representative index n_(r) includes n_(cs),n_(oc) and n_(rb). n_(r) satisfies n_(r)=(n_(cs), n_(oc), n_(rb)).

A CQI, a PMI, a RI, and a combination of a CQI and ACK/NACK may betransmitted through the PUCCH formats 2/2a/2b. Reed Muller (RM) channelcoding may be applied.

For example, in an LTE system, channel coding for a UL CQI is describedas follows. A bit stream a₀, a₁, a₂, a₃, . . . , a_(A-1) ischannel-coded using a (20, A) RM code. Table 10 shows a base sequencefor the (20, A) code. a₀ and a_(A-1) represent a Most Significant Bit(MSB) and a Least Significant Bit (LSB), respectively. In the extendedCP case, a maximum information bit number is 11 except for the casewhere the CQI and the ACK/NACK are simultaneously transmitted. After thebit stream is coded to 20 bits using the RM code, QPSK modulation may beapplied. Before QPSK modulation, coded bits may be scrambled.

TABLE 10 I M_(i, 0) M_(i, 1) M_(i, 2) M_(i, 3) M_(i, 4) M_(i, 5)M_(i, 6) M_(i, 7) M_(i, 8) M_(i, 9) M_(i, 10) M_(i, 11) M_(i, 12) 0 1 10 0 0 0 0 0 0 0 1 1 0 1 1 1 1 0 0 0 0 0 0 1 1 1 0 2 1 0 0 1 0 0 1 0 1 11 1 1 3 1 0 1 1 0 0 0 0 1 0 1 1 1 4 1 1 1 1 0 0 0 1 0 0 1 1 1 5 1 1 0 01 0 1 1 1 0 1 1 1 6 1 0 1 0 1 0 1 0 1 1 1 1 1 7 1 0 0 1 1 0 0 1 1 0 1 11 8 1 1 0 1 1 0 0 1 0 1 1 1 1 9 1 0 1 1 1 0 1 0 0 1 1 1 1 10 1 0 1 0 0 11 1 0 1 1 1 1 11 1 1 1 0 0 1 1 0 1 0 1 1 1 12 1 0 0 1 0 1 0 1 1 1 1 1 113 1 1 0 1 0 1 0 1 0 1 1 1 1 14 1 0 0 0 1 1 0 1 0 0 1 0 1 15 1 1 0 0 1 11 1 0 1 1 0 1 16 1 1 1 0 1 1 1 0 0 1 0 1 1 17 1 0 0 1 1 1 0 0 1 0 0 1 118 1 1 0 1 1 1 1 1 0 0 0 0 0 19 1 0 0 0 0 1 1 0 0 0 0 0 0

Channel coded bits b₀, b₁, b₂, b₃, . . . , b_(B-1) may be generated byEquation 9.

$\begin{matrix}{b_{i} = {\sum\limits_{n = 0}^{A - 1}{\left( {a_{n} \cdot M_{i,n}} \right){mod}\; 2}}} & {{Equation}\mspace{14mu} 9}\end{matrix}$

where, i=0, 1, 2, . . . , B-1 is satisfied.

Table 11 shows an uplink control information (UCI) field for widebandreport (single antenna port, transmit diversity or open loop spatialmultiplexing PDSCH) CQI feedback.

TABLE 11 Field bandwidth Wideband CQI 4

Table 12 shows a UCI field for wideband CQI and PMI feedback. The fieldreports closed loop spatial multiplexing PDSCH transmission.

TABLE 12 Bandwidth 2 antenna ports 4 antenna ports Field Rank = 1 Rank =2 Rank = 1 Rank >1 Wideband CQI 4 4 4 4 Spatial differential CQI 0 3 0 3PMI 2 1 4 4 (Precoding Matrix Index)

Table 13 shows a UCI field for RI feedback for wideband report.

TABLE 13 Bit widths 4 antenna ports Maximum of two Maximum Field 2antenna ports layers of four layers RI (Rank Indication) 1 1 2

FIG. 19 shows PRB allocation. As shown in FIG. 19, the PRB may be usedfor PUCCH transmission in a slot n_(s).

A multi-carrier system or a carrier aggregation system refers to asystem for aggregating and utilizing a plurality of carriers having abandwidth smaller than a target bandwidth, for wideband support. When aplurality of carriers having a bandwidth smaller than a target bandwidthis aggregated, the bandwidth of the aggregated carriers may be limitedto a bandwidth used in the existing system, for backward compatibilitywith the existing system. For example, the existing LTE system maysupport bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz and an LTE-Advanced(LTE-A) system evolved from the LTE system may support a bandwidthgreater than 20 MHz using only the bandwidths supported by the LTEsystem. Alternatively, regardless of the bandwidths used in the existingsystem, a new bandwidth may be defined so as to support CA.Multi-carrier may be used interchangeable with CA and bandwidthaggregation. CA includes contiguous CA and non-contiguous CA.

FIG. 20 is a conceptual diagram of management of a downlink componentcarrier in a BS, and FIG. 21 is a conceptual diagram of management of anuplink component carrier in a UE. For convenience of description, it isassumed that a higher layer is a MAC layer in FIGS. 20 and 21.

FIG. 22 is a conceptual diagram of the case where one MAC layer managesmultiple carriers in a BS. FIG. 23 is a conceptual diagram of the casewhere one MAC layer manages multiple carriers in a UE.

Referring to FIGS. 22 and 23, one MAC layer manages one or morefrequency carriers so as to perform transmission and reception. Sincefrequency carriers managed by one MAC layer do not need to be contiguousto each other, resource management is flexible. In FIGS. 22 and 23, onephysical (PHY) layer means one component carrier, for convenience. OnePHY layer does not necessarily mean an independent radio frequency (RF)device. In general, one independent RF device means one PHY layer, butthe present invention is not limited thereto. One RF device may includeseveral PHY layers.

FIG. 24 is a conceptual diagram of the case where a plurality of MAClayers manages multiple carriers in a BS. FIG. 25 is a conceptualdiagram of the case where a plurality of MAC layers manages multiplecarriers in a UE, FIG. 26 is another conceptual diagram of the casewhere a plurality of MAC layers manages multiple carriers in a BS, andFIG. 27 is another conceptual diagram of the case where a plurality ofMAC layers manages multiple carriers in a UE.

In addition to the structures shown in FIGS. 22 and 23, several MAClayers may control several carriers as shown in FIGS. 24 to 27.

Each MAC layer may control each carrier in one-to-one correspondence asshown in FIGS. 24 and 25 and each MAC layer may control each carrier inone-to-one correspondence with respect to some carriers and one MAClayer may control one or more carriers with respect to the remainingcarriers as shown in FIGS. 26 and 27.

The system includes a plurality of carriers such as one carrier to Ncarriers and the carriers may be contiguous or non-contiguous,regardless of UL/DL. A TDD system is configured to manage a plurality(N) of carriers in DL and UL transmission. A FDD system is configuredsuch that a plurality of carriers is used in each of UL and DL. In thecase of the FDD system, asymmetric CA in which the number of carriersaggregated in UL and DL and/or the bandwidths of the carriers aredifferent may be supported.

When the numbers of aggregated component carriers in UL and DL are thesame, it is possible to configure all component carriers so as to enablebackward compatibility with the existing system. However, componentcarriers which do not consider compatibility are not excluded from thepresent invention.

Hereinafter, for convenience of description, it is assumed that, when aPDCCH is transmitted through a DL component carrier #0, a PDSCHcorresponding thereto is transmitted through a DL component carrier #0.However, cross-carrier scheduling may be applied and the PDSCH may betransmitted through another DL component carrier. The term “componentcarrier” may be replaced with other equivalent terms (e.g., cell).

FIG. 28 shows a scenario in which uplink control information (UCI) istransmitted in a wireless communication system supporting CA. Forconvenience, in the present example, it is assumed that the UCI isACK/NACK (NN). The UCI may include control information channel stateinformation (e.g., CQI, PMI, RI, etc.) or scheduling request information(e.g., SR, etc.).

FIG. 28 is a diagram showing asymmetric CA in which five DL CCs and oneUL CC are linked. The shown asymmetric CA is set from the viewpoint ofUCI transmission. That is, a DL CC-UL CC linkage for UCI and a DL CC-ULCC linkage for data are differently set. For convenience, if it isassumed that one DL CC may transmit a maximum of two codewords, thenumber of UL ACK/NACK bits is at least two. In this case, in order totransmit ACK/NACK for data received through five DL CCs through one ULCC, ACK/NACK of at least 10 bits is necessary. In order to support a DTXstate of each DL CC, at least 12 bits (=5̂5=3125=11.61 bits) arenecessary for ACK/NACK transmission. Since ACK/NACK of at most 2 bitsmay be transmitted in the existing PUCCH formats 1a/1b, such a structurecannot transmit extended ACK/NACK information. For convenience, althoughan example in which the amount of UCI information is increased due to CAis described, the amount of UCI information may be increased due to theincrease in the number of antennas, existence of a backhaul subframe ina TDD system and a relay system, etc. Similarly to ACK/NACK, whencontrol information associated with a plurality of DL CCs is transmittedthrough one UL CC, the amount of control information to be transmittedis increased. For example, in the case where a CQI for a plurality of DLCCs must be transmitted through a UL anchor (or primary) CC, CQI payloadmay be increased.

A DL primary CC may be defined to a DL CC linked with a UL primary CC.Linkage includes implicit and explicit linkage. In the LTE, one DL CCand one UL CC are inherently paired. For example, by LTE pairing, a DLCC linked with a UL primary CC may be referred to as a DL primary CC.This may be regarded as implicit linkage. Explicit linkage indicatesthat a network configures linkage in advance and may be signaled by RRC,etc. In explicit linkage, a DL CC paired with a UL primary CC may bereferred to as a primary DL CC. A UL primary (or anchor) CC may be a ULCC in which a PUCCH is transmitted. Alternatively, the UL primary CC maybe a UL CC in which UCI is transmitted through a PUCCH or a PUSCH. A DLprimary CC may be configured through high layer signaling. A DL primaryCC may be a DL CC in which a UE performs initial access. DL CCsexcluding the DL primary CC may be referred to as DL secondary CCs.Similarly, UL CCs excluding a UL primary CC may be referred to as ULsecondary CCs.

The LTE-A uses the concept of a cell in order to manage radio resources.The cell is defined as a combination of downlink resources and uplinkresources and uplink resources are not indispensable components.Accordingly, the cell may be composed of downlink resources alone or acombination of downlink resources and uplink resources. If CA issupported, a linkage between a downlink resource carrier frequency (orDL CC) and an uplink resource carrier frequency (or UL CC) may beindicated by system information. A cell which operates on a primaryfrequency (or a PCC) is referred to as a primary cell (PCell) and a cellwhich operates on a secondary frequency (or an SCC) is referred to as asecondary cell (SCell). A DL CC and a UL CC may be referred to as a DLcell and a UL cell, respectively. In addition, an anchor (or primary) DLCC and an anchor (or primary) UL CC may be referred to as a DL PCell anda UL PCell, respectively. The PCell is used to perform an initialconnection establishment process or a connection re-establishmentprocess by a UE. The PCell may indicate a cell indicated in a handoverprocess. The SCell may be configured after RRC connection establishmentis performed and may be used to provide additional radio resources. ThePCell and the SCell may be collectively called a serving cell.Accordingly, in case of a UE which is in an RRC_CONNECTED state but isnot configured with CA or does not support CA, only one serving cellincluding only a PCell exists. In contrast, in case of a UE which is inan RRC_CONNECTED state and configured with CA, one or more serving cellsexist and each serving cell includes a PCell and all SCells. For CA, anetwork may configure one or more SCells may be configured for a UEsupporting CA after starting an initial security activation process, inaddition to a PCell which is initially configured in a connectionestablishment process.

DL-UL pairing may be defined only in FDD. Since TDD uses the samefrequency, DL-UL pairing may not be defined. DL-UL linkage may bedetermined from UL linkage through UL E-UTRA Absolute Radio FrequencyChannel Number (EARFCN) information of SIB2. For example, DL-UL linkagemay be acquired through SIB2 decoding during initial access and,otherwise, may be acquired through RRC signaling. Accordingly, only SIB2linkage may be present, but other DL-UL pairing may not be explicitlydefined. For example, in the 5DL:1 UL structure of FIG. 28, DL CC#0 andUL CC#0 have an SIB2 linkage relationship and the remaining DL CCs mayhave a relationship with other UL CCs which are not configured for theUE.

In order to support a scenario such as FIG. 28, new scheme is necessary.Hereinafter, a PUCCH format for feedback of UCI (e.g., multiple A/Nbits) in a communication system supporting a carrier aggregation isreferred to a CA PUCCH format (or PUCCH format 3). For example, PUCCHformat 3 is used to transmit NN information (possibly, including DTXstate) corresponding PDSCH (or PDCCH) received on multiple DL servingcells.

FIGS. 29A to 29F show the structure of PUCCH format 3 and a signalprocessing procedure therefore according to the present embodiment.

FIG. 29A shows the case where the PUCCH format according to the presentembodiment is applied to the structure of the PUCCH format 1 (normalCP). Referring to FIG. 29A, a channel coding block channel-codesinformation bits a_(—)0, a_(—)1, . . . , and a_M−1 (e.g., multipleACK/NACK bits) and generates encoded bits (coded bits or coding bits)(or codewords) b_(—)0, b_(—)1, . . . , and b_N−1. M denotes the size ofthe information bits and N denotes the size of the encoded bits. Theinformation bits include UCI, for example, multiple ACK/NACK bits for aplurality of data (or PDSCHs) received through a plurality of DL CCs.The information bits a_(—)0, a_(—)1, . . . , and a_M−1 are joint-codedregardless of the kind/number/size of UCI configuring the informationbits. For example, if the information bits include multiple ACK/NACKbits for a plurality of DL CCs, channel coding is performed not withrespect to each DL CC or each ACK/NACK bit, but with respect to entirebit information. Thus, a single codeword is generated. Channel codingincludes but not limited to simplex repetition, simplex coding, ReedMuller (RM) coding, punctured RM coding, tail-biting convolutionalcoding (TBCC), low-density parity-check (LDPC) and turbo-coding.Although not shown, the encoded bits can be rate-matched inconsideration of a modulation order and the amount of resources. Therate-matching function may be included in the channel coding block ormay be performed using a separate functional block. For example, thechannel coding block may perform (32, 0) RM coding with respect to aplurality of control information so as to obtain a single codeword andperform circular buffer rate-matching.

A modulator modulates the encoded bits b_(—)0, b_(—)1, . . . , and b_N−1and generates modulation symbols c_(—)0, c_(—)1, . . . , and c_L−1. Ldenotes the size of the modulation symbols. The modulation method isperformed by changing the amplitude and phase of the transmitted signal.The modulation method includes, for example, n-phase shift keying (PSK)and n-quadrature amplitude modulation (QAM) (n is an integer greaterthan or equal to 2). More specifically, the modulation method mayinclude binary PSK (BPSK), quadrature PSK (QPSK), 8-PSK, QAM, 16-QAM,64-QAM, etc.

A divider divides the modulation symbols c_(—)0, c_(—)1, . . . , andc_L−1 into slots. The order/pattern/method of dividing the modulationsymbols to slots is not specially limited. For example, the divider maydivide the modulation symbols to slots sequentially from the head (localtype). In this case, as shown, the modulation symbols c_(—)0, c_(—)1, .. . , and c_L/2−1 may be divided to a slot 0 and the modulation symbolsc_L/2, c_L/2+1, . . . , and c_L−1 may be divided to a slot 1. Themodulation symbols may be interleaved (or permutated) when being dividedto the slots. For example, even-numbered modulation symbols may bedivided to the slot 0 and odd-numbered modulation symbols may be dividedto the slot 1. The order of the modulation process and the divisionprocess may be changed. Instead of dividing different coding bits intoslots, the same coding bits may be configured to be repeated in slotunits. In this case, the divider may be omitted.

A DFT precoder performs DFT precoding (e.g., 12-point DFT) with respectto the modulation symbols divided to the slots, in order to generate asingle carrier waveform. Referring to the drawing, the modulationsymbols c_(—)0, c_(—)1, . . . , and c_L/2−1 divided to the slot 0 areDFT-precoded to DFT symbols d_(—)0, d_(—)1, . . . , and d_L/2−1, and themodulation symbols c_L/2, c_L/2+1, . . . , and c_L−1 divided to the slot1 are DFT-precoded to DFT symbols d_L/2, d_L/2+1, . . . , and d_L−1. DFTprecoding may be replaced with another linear operation (e.g., Walshprecoding). The DFT precoder may be replaced with a CAZAC modulator. TheCAZAC modulator modulates the modulation symbols c_(—)0, c_(—)1, . . . ,and c_L/2−1 and c_L/2, c_L/2+1, . . . , and c_L−1 divided to the slotswith corresponding sequences and generate CAZAC modulation symbolsd_(—)0, d_(—)1, . . . , d_I/2−1 and d_L/2, d_L/2+1, . . . , and d_L−1.The CAZAC modulator includes, for example, CAZAC sequences or sequencesfor LTE computer generated (CG) 1 RB. For example, if the LTE CGsequences are r_(—)0, . . . , and r_L/2−1, the CAZAC modulation symbolsmay be d_n=c_n*r_n or d_n=conj(c_n)*r_n.

A spreading block spreads a signal subjected to DFT at an SC-FDMA symbollevel (time domain). Time domain spreading of the SC-FDMA symbol levelis performed using a spreading code (sequence). The spreading codeincludes a quasi-orthogonal code and an orthogonal code. Thequasi-orthogonal code includes, but is not limited to, a pseudo noise(PN) code. The orthogonal code includes, but is not limited to, a Walshcode and a DFT code. Although the orthogonal code is described as arepresentative example of the spreading code for ease of description inthe present specification, the orthogonal code is only exemplary and maybe replaced with a quasi-orthogonal code. A maximum value of a spreadingcode size (or a spreading factor (SF)) is restricted by the number ofSC-FDMA symbols used to transmit control information. For example, inthe case where four SC-FDMA symbols are used to transmit controlinformation in one slot, (quasi-)orthogonal codes w0, w1, w2 and w3having a length of 4 may be used in each slot. The SF means thespreading degree of the control information and may be associated withthe multiplexing order of a UE or the multiplexing order of an antenna.The SF may be changed to 1, 2, 3, 4, . . . according to requirements ofthe system and may be defined between a BS and a UE in advance or may beinformed to the UE through DCI or RRC signaling. For example, in thecase where one of SC-FDMA symbols for control information is puncturedin order to transmit an SRS, a spreading code with a reduced SF (e.g.,SF=3 instead of SF=4) may be applied to the control information of theslot.

The signal generated through the above procedure is mapped tosubcarriers in a PRB, is subjected to IFFT, and is transformed into atime domain signal. The time domain signal is attached with CP and thegenerated SC-FDMA symbols are transmitted through a RF stage.

On the assumption that ACK/NACK for five DL CCs is transmitted, eachprocedure will be described in detail. In the case where each DL CC maytransmit two PDSCHs, the number ACK/NACK bits may be 12 if a DTX stateis included. In consideration of QPSK modulation and SF=4 timespreading, a coding block size (after rate-matching) may be 48 bits. Theencoded bits may be modulated into 24 QPSK symbols and 12 symbols of thegenerated QPSK symbols are divided to each slot. In each slot, 12 QPSKsymbols are converted into 12 DFT symbols by a 12-point DFT operation.In each slot, 12 DFT symbols are spread to four SC-FDMA symbols usingthe spreading code having SF=4 in a time domain and are mapped. Since 12bits are transmitted through [2 bits*12 subcarriers+8 SC-FDMA symbols],the coding rate is 0.0625 (=12/192). In case of SF=4, a maximum of fourUEs may be multiplexed per 1PRB.

The signal processing procedure described with reference to FIG. 29A isonly exemplary and the signal mapped to the PRB in FIG. 29A may beobtained using various equivalent signal processing procedures. Thesignal processing procedures equivalent to FIG. 29A will be describedwith reference to FIGS. 29B to 29F.

FIG. 29B is different from FIG. 29A in the order of the DFT precoder andthe spreading block. In FIG. 29A, since the function of the spreadingblock is equal to multiplication of a DFT symbol sequence output fromthe DFT precoder by a specific constant at an SC-FDMA symbol level, thevalue of the signal mapped to the SC-FDMA symbols is identical even whenthe order of the DFT precoder and the spreading block is changed.Accordingly, the signal processing procedure for the PUCCH format 3 maybe performed in order of channel coding, modulation, division, spreadingand DFT precoding. In this case, the division process and the spreadingprocess may be performed by one functional block. For example, themodulation symbols may be spread at the SC-FDMA symbol level while beingalternately divided to slots. As another example, the modulation symbolsare copied to suit the size of the spreading code when the modulationsymbols are divided to slots, and the modulation symbols and theelements of the spreading code may be multiplied in one-to-onecorrespondence. Accordingly, the modulation symbol sequence generated ineach slot is spread to a plurality of SC-FDMA symbols at the SC-FDMAsymbol level. Thereafter, the complex symbol sequence corresponding toeach SC-FDMA symbol is DFT-precoded in SC-FDMA symbol units.

FIG. 29C is different from FIG. 29A in the order of the modulator andthe divider. Accordingly, the signal processing procedure for the PUCCHformat 3 may be performed in order of joint channel coding and divisionat a subframe level and modulation, DFT precoding and spreading at eachslot level.

FIG. 29D is different from FIG. 29C in order of the DFT precoder and thespreading block. As described above, since the function of the spreadingblock is equal to multiplication of a DFT symbol sequence output fromthe DFT precoder by a specific constant at an SC-FDMA symbol level, thevalue of the signal mapped to the SC-FDMA symbols is identical even whenthe order of the DFT precoder and the spreading block is changed.Accordingly, the signal processing procedure for the PUCCH format 3 maybe performed by joint channel coding and division at a subframe leveland modulation at each slot level. The modulation symbol sequencegenerated in each slot is spread to a plurality of SC-FDMA symbols atthe SC-FDMA symbol level and the modulation symbol sequencecorresponding to each SC-FDMA symbol is DFT-precoded in SC-FDMA symbolunits. In this case, the modulation process and the spreading processmay be performed by one functional block. For example, the generatedmodulation symbols may be directly spread at the SC-FDMA symbol levelwhile the encoded bits are modulated. As another example, the modulationsymbols are copied to suit the size of the spreading code when theencoded bits are modulated, and the modulation symbols and the elementsof the spreading code may be multiplied in one-to-one correspondence.

FIG. 29E shows the case where the PUCCH format 3 according to thepresent embodiment is applied to the structure of the PUCCH format 2(normal CP) and FIG. 29F shows the case where the PUCCH format 3according to the present embodiment is applied to the structure of thePUCCH format 2 (extended CP). The basic signal processing procedure isequal to those described with respect to FIGS. 29A to 29D. As thestructure of the PUCCH format 2 of the existing LTE is reused, thenumber/locations of UCI SC-FDMA symbols and RS SC-FDMA symbols in thePUCCH format 3 is different from that of FIG. 29A.

Table 14 shows the location of the RS SC-FDMA symbol in the PUCCH format3. It is assumed that the number of SC-FDMA symbols in a slot is 7(indexes 0 to 6) in the normal CP case and the number of SC-FDMA symbolsin a slot is 6 (indexes 0 to 5) in the extended CP case.

TABLE 14 SC-FDMA symbol location of RS Normal CP Extended CP Note PUCCHformat 3 2, 3, 4 2, 3 PUCCH format 1 is reused 1, 5 3 PUCCH format 2 isreused

Here, the RS may reuse the structure of the existing LTE. For example,an RS sequence may be defined using cyclic shift of a base sequence (seeEquation 1).

A multiplexing capacity of a UCI data part is 5 due to SF=5. Amultiplexing capacity of an RS part is determined according to a cyclicshift interval Δ_(shift) ^(PUCCH). More specifically, the multiplexingcapacity of the RS part is

$\frac{12}{\Delta_{shift}^{PUCCH}}.$

For example, multiplexing capacities are 12, 6 and 4 in case ofΔ_(shift) ^(PUCCH)=1, Δ_(shift) ^(PUCCH)=2 and Δ_(shift) ^(PUCCH)=3,respectively. In FIGS. 29E to 29F, the multiplexing capacity of the UCIdata part is 5 due to SF=5 and the multiplexing capacity of the RS partis 4 in case of Δ_(shift) ^(PUCCH)=3. Thus, the total multiplexingcapacity is set to 4 which is the smaller capacity of the twomultiplexing capacities.

FIG. 30 shows the structure of PUCCH format 3 with an increasedmultiplexing capacity. Referring to FIG. 30, SC-FDMA symbol levelspreading is applied to the RS part in a slot. Thus, the multiplexingcapacity of the RS part doubles. That is, even in case of Δ_(shift)^(PUCCH)=3, the multiplexing capacity of the RS part becomes 8 and themultiplexing capacity of the UCI data part is not lost. The orthogonalcode cover for the RS includes, but is not limited to, a Walsh cover of[y1 y2]=[1 1], [1 −1] or a linearly transformed form (e.g., [j j], [j−j], [1 j], [1 −j], etc.) thereof. y1 is applied to a first RS SC-FDMAsymbol in the slot and y2 is applied to a second SC-FDMA symbol in theslot.

FIG. 31 shows the structure of another PUCCH format 3 with an increasedmultiplexing capacity. If slot-level frequency hopping is not performed,spreading or covering (e.g., Walsh covering) may be additionallyperformed in slot units so as to double the multiplexing capacity. Inthe case where slot-level frequency hopping is performed, if Walshcovering is applied in slot units, orthogonality may be broken due to adifference between channel conditions of slots. The slot unit spreadingcode (e.g., orthogonal code cover) for the RS includes, but is notlimited to, a Walsh cover of [x1 x2]=[1 1], [1 −1] or a linearlytransformed form (e.g., [j j], [j −j], [1 j], [1 −j], etc.) thereof. x1is applied to a first slot and x2 is applied to a second slot. Althoughthe case where slot-level spreading (or covering) is performed andspreading (or covering) is then performed at an SC-FDMA symbol level isshown in the drawing, the order may be changed.

A signal processing procedure of PUCCH format 3 will be described usingequations. For convenience, it is assumed that a length-5 OCC is used(e.g., FIGS. 29E to 31).

First, a bit block b(0), . . . , b(M_(bit)−1) is scrambled with aUE-specific scrambling sequence. The bit block b(0), . . . ,b(M_(bit)−1) may correspond to coded bits b_(—)0, b_(—)1, b_N−1 of FIG.29A. The bit block b(0), . . . , b(M_(bit)−1) may include at least oneof an ACK/NACK bit, a CSI bit and an SR bit. The scrambled bit block{tilde over (b)}(0), . . . , {tilde over (b)}(M_(bit)−1) may begenerated by the following equation.

{tilde over (b)}(i)=(b(i)+c(i))mod 2  Equation 10

where, c(i) denotes a scrambling sequence. c(i) includes a pseudo-randomsequence defined by a length-31 gold sequence and may be generated bythe following equation. mod denotes a modulo operation.

c(n)=(x ₁(n+N _(C))+x ₂(n+N _(C)))mod 2

x ₁(n+31)=(x ₁(n+3)+x ₁(n))mod 2

x ₂(n+31)=(x ₂(n+3)+x ₂(n+2)+x ₂(n+1)+x ₂(n))mod 2  Equation 11

where, N_(C)=1600. A first m-sequence is initialized to x₁(0)=1,x₁(n)=0,n=1, 2, . . . , 30. A second m-sequence is initialized toc_(init)=Σ_(i=0) ³⁰x₂(i)·2^(i). c_(init) may be initialized toc_(init)=(└n_(s)/2┘+1)·(2N_(ID) ^(cell)+1)·2¹⁶+n_(RNTI) whenever asubframe is started. n_(s) denotes a slot number in a radio frame,N_(ID) ^(cell) denotes a physical layer cell identity, and n_(RNTI)denotes a radio network temporary identifier.

The scrambled bit block {tilde over (b)}(0), . . . , {tilde over(b)}(M_(bit)−1) is modulated and a complex modulation symbol block d(0),. . . , d(M_(symb)−1) is generated. When QPSK modulation is performed,M_(symb)=M_(bit)/2=2N_(sc) ^(RB). The complex modulation symbol blocksd(0), . . . , d(M_(symb)−1) correspond to modulation symbols c_(—)0,c_(—)1, c_N−1 of FIG. 29A.

The complex modulation symbol blocks d(0), . . . , d(M_(symb)−1) areblock-wise spread using an orthogonal sequence w_(n) _(oc) (i). N_(SF,0)^(PUCCH)+N_(SF,1) ^(PUCCH) complex symbol sets are generated by thefollowing equation. A frequency division/spreading process of FIG. 29Bis performed by the following equation. Each complex symbol setcorresponds to one SC-FDMA symbol and has N_(sc) ^(RB) (e.g., 12)complex modulation values.

$\begin{matrix}{{y_{n}(i)} = \left\{ {{{\begin{matrix}{{w_{n_{{oc},}0}\left( \overset{\_}{n} \right)} \cdot ^{{j\pi}{{\lfloor{{n_{cs}^{cell}{({n_{s},l})}}/64}\rfloor}/2}} \cdot {d(i)}} & {n < N_{{SF},0}^{PUCCH}} \\{{w_{n_{{oc},}1}\left( \overset{\_}{n} \right)} \cdot ^{{j\pi}{{\lfloor{{n_{cs}^{cell}{({n_{s},l})}}/64}\rfloor}/2}} \cdot {d\left( {N_{sc}^{RB} + i} \right)}} & {otherwise}\end{matrix}\mspace{20mu} \overset{\_}{n}} = {{n\; {mod}\; N_{{SF},0}^{PUCCH}\mspace{20mu} n} = 0}},\ldots \mspace{14mu},{{N_{{SF},0}^{PUCCH} + N_{{SF},1}^{PUCCH} - {1\mspace{20mu} i}} = 0},1,\ldots \mspace{14mu},{N_{sc}^{RB} - 1}} \right.} & {{Equation}\mspace{14mu} 12}\end{matrix}$

where, N_(SF,0) ^(PUCCH) and N_(SF,1) ^(PUCCH) correspond to the numberof SC-FDMA symbols used for PUCCH transmission at slot 0 and slot 1,respectively. In case of using normal PUCCH format 3, N_(SF,0)^(PUCCH)=N_(SF,1) ^(PUCCH)=5. In case of using shortened PUCCH format 3,N_(SF,0) ^(PUCCH)=5 and N_(SF,1) ^(PUCCH)=4. w_(n) _(oc,0) (i) and w_(n)_(oc,1) (i) respectively indicate orthogonal sequences applied to a slot0 and a slot 1 and are given by Table 15. n_(oc) denotes an orthogonalsequence index (or an orthogonal code index). └┘ denotes a flooringfunction. n_(cs) ^(cell)(n_(s),l) may be n_(cs) ^(cell)(n_(s),l)=Σ_(i=0)⁷c(8N_(symb) ^(UL)·n_(s)+8l+i)·2_(i). c(i) may be given by Equation 11and may be initialized to c_(init)=N_(ID) ^(cell) at the beginning ofevery radio frame.

Table 15 shows a sequence index n_(oc) and an orthogonal sequence w_(n)_(oc) (i).

TABLE 15 Orthogonal Sequence sequence [w_(n) _(oc) (0) . . . w_(n) _(oc)(N_(SF) ^(PUCCH) − 1)] index n_(oc) N_(SF) ^(PUCCH) = 5 N_(SF) ^(PUCCH)= 4 0 [1 1 1 1 1] [+1 +1 +1 +1] 1 [1 e^(j2π/5) e^(j4π/5) e^(j6π/5)e^(j8π/5)] [+1 −1 +1 −1] 2 [1 e^(j4π/5) e^(j8π/5) e^(j2π/5) e^(j6π/5)][+1 −1 −1 +1] 3 [1 e^(j6π/5) e^(j2π/5) e^(j8π/5) e^(j4π/5)] [+1 +1 −1−1] 4 [1 e^(j8π/5) e^(j6π/5) e^(j4π/5) e^(j2π/5)] —

In Table 15, N_(SF) ^(PUCCH=)5 orthogonal sequence (or code) isgenerated by the following equation.

$\begin{matrix}\begin{bmatrix}^{j\frac{2{\pi \cdot 0 \cdot n_{oc}}}{5}} & ^{j\frac{2{\pi \cdot 1 \cdot n_{oc}}}{5}} & ^{j\frac{2{\pi \cdot 2 \cdot n_{oc}}}{5}} & ^{j\frac{2{\pi \cdot 3 \cdot n_{oc}}}{5}} & ^{j\frac{2{\pi \cdot 4 \cdot n_{oc}}}{5}}\end{bmatrix} & {{Equation}\mspace{14mu} 13}\end{matrix}$

Resources for PUCCH format 3 are identified by a resource indexn_(PUCCH) ⁽³⁾. For example, n_(oc) may be n_(oc)=n_(PUCCH) ⁽³⁾ modN_(SF,1) ^(PUCCH). n_(PUCCH) ⁽³⁾ may be indicated through a transmitpower control (TPC) field of an SCell PDCCH. More specifically, n_(oC)for each slot may be given by the following equation.

$\begin{matrix}{{n_{{oc},0} = {n_{PUCCH}^{(3)}{mod}\; N_{{SF},1}^{PUCCH}}}{n_{{oc},1} = \left\{ \begin{matrix}{\left( {3n_{{oc},0}} \right){mod}\; N_{{SF},1}^{PUCCH}} & {{{if}\mspace{14mu} N_{{SF},1}^{PUCCH}} = 5} \\{n_{{oc},0}{mod}\; N_{{SF},1}^{PUCCH}} & {otherwise}\end{matrix} \right.}} & {{Equation}\mspace{14mu} 14}\end{matrix}$

where, n_(oc,0), denotes a sequence index value n_(oc) for a slot 0 andn_(oc,1) denotes a sequence index value n_(oc) for slot 1. In case ofnormal PUCCH format 3, N_(SF,0) ^(PUCCH)=N_(SF,1) ^(PUCCH)=5. In case ofshortened PUCCH format 3, N_(SF,0) ^(PUCCH)=5, N_(SF,1) ^(PUCCH)=4.

A block-spread complex symbol set may be cyclic-shifted according to thefollowing equation.

{tilde over (y)} _(n)(i)=y _(n)((i+n _(cs) ^(cell)(n _(s) ,l))mod N_(sc) ^(RB))  Equation 15

where, n_(s) denotes a slot number within a radio frame and l denotes anSC-FDMA symbol number within a slot. n_(cs) ^(cell)(n_(s),l) is definedby Equation 12. n=0, . . . , N_(SF,0) ^(PUCCH)+N_(SF,1) ^(PUCCH)−1.

Each cyclic-shifted complex symbol set is transform-precoded accordingto the following equation. As a result, a complex symbol block z(0), . .. , z((N_(SF,0) ^(PUCCH)+N_(SF,1) ^(PUCCH))N_(sc) ^(RB−)1) is generated.

$\begin{matrix}{{{z\left( {{n \cdot N_{sc}^{RB}} + k} \right)} = {\frac{1}{\sqrt{P}}\frac{1}{\sqrt{N_{sc}^{RB}}}{\sum\limits_{i = 0}^{N_{sc}^{RB} - 1}{{{\overset{\sim}{y}}_{n}(i)}^{{- j}\frac{2\pi \; \; k}{N_{sc}^{RB}}}}}}}{{k = 0},\ldots \mspace{14mu},{N_{sc}^{RB} - 1}}{{n = 0},\ldots \mspace{14mu},{N_{{SF},0}^{PUCCH} + N_{{SF},1}^{PUCCH} - 1}}} & {{Equation}\mspace{14mu} 16}\end{matrix}$

The complex symbol block z(0), . . . , z((N_(SF,0) ^(PUCCH)+N_(SF,1)^(PUCCH))N_(sc) ^(RB−)1) is mapped to physical resources after powercontrol. A PUCCH uses one resource block in each slot of a subframe. Inthe resource block, z(0), . . . , z((N_(SF,0) ^(PUCCH)+N_(SF,1)^(PUCCH))N_(sc) ^(RB−)1) is mapped to a resource element (k,l) on anantenna port p, which is not used for RS transmission (see Table 14).Mapping is performed in ascending order of a first slot of a subframe, kand l. k denotes a subcarrier index and l denotes an SC-FDMA symbolindex in a slot.

Next, a UL transmission mode configuration will be described. Atransmission mode for a PUCCH may be roughly divided into two modes. Oneis a single antenna transmission mode and the other is a multi-antennatransmission mode. The single antenna transmission mode refers to amethod of transmitting a signal through a single antenna when a UEtransmits a PUCCH or a method of enabling a receiver (e.g., a BS) torecognize that a signal is transmitted through a single antenna. In themulti-antenna transmission mode, a UE may use a virtualization scheme(e.g., PVS, antenna selection, CDD, etc.) while transmitting a signalthrough multiple antennas. The multi-antenna transmission mode indicatesthat a UE transmits a signal to a BS through multiple antennas using atransmit diversity or MIMO scheme. As a transmit diversity scheme usedat this time, a spatial orthogonal resource transmit diversity (SORTD)may be used. In the present specification, for convenience, themulti-antenna transmission mode is referred to as a SORTD mode unlessstated otherwise.

FIG. 32 shows a signal processing block/procedure for SORTD. The basicprocedure excluding the multi-antenna transmission process is equal tothat described with reference to FIGS. 29 to 31. Referring to FIG. 32,modulation symbols c_(—)0, . . . , c_(—)23 are DFT-precoded andtransmitted through resources (e.g., OC, PRB or a combination thereof)given on a per antenna port basis. In this example, although one DFToperation is performed for a plurality of antenna ports, the DFToperation may be performed on a per antenna port basis. In addition,although the DFT-precoded symbols d_(—)0, . . . , d_(—)23 aretransmitted through a second OC/PRB in a state of being duplicated, amodified form (e.g., complex conjugate or scaling) of the DFT-precodedsymbols d_(—)0, . . . , d_(—)23 may be transmitted through the secondOC/PRB. For example, in order to guarantee orthogonality between PUCCHsignals transmitted through different antenna ports, [OC⁽⁰⁾≠OC⁽¹⁾;PRB⁽⁰⁾=PRB⁽¹⁾], [OC⁽⁰⁾=OC⁽¹⁾; PRB⁽⁰⁾≠PRB⁽¹⁾] and [OC⁽⁰⁾≠OC⁽¹⁾;PRB⁽⁰⁾≠PRB⁽¹⁾] are possible. Here, numbers in superscript denote anantenna port number or a value corresponding thereto.

FIG. 33 is a schematic diagram illustrating a SORTD operation. Referringto FIG. 33, a UE acquires a first resource index and a second resourceindex (S3310). The resource index (or resource value) indicates a PUCCHresource index (or PUCCH resource value) and preferably a PUCCH format 3resource index (or PUCCH format 3 resource value). Step S3310 mayinclude a plurality of steps which are sequentially performed. Themethod of acquiring the first resource index and the second resourceindex will be described in detail below. Thereafter, the UE transmits aPUCCH signal using PUCCH resources corresponding to the first resourceindex through a first antenna (port) (S3320). The UE transmits a PUCCHsignal using PUCCH resources corresponding to the second resource indexthrough a second antenna (port) (S3330). Steps S3320 and S3330 areperformed on the same subframe.

The PUCCH signal may include hybrid automatic repeat requestacknowledgement (HARQ-ACK). HARQ-ACK includes a response (e.g., ACK,NACK, DTX or NACK/DTX) to a downlink signal. If the PUCCH includesHARQ-ACK, although not shown, the procedure of FIG. 33 further includesa step of receiving a downlink signal. The step of receiving thedownlink signal includes receiving a PDCCH for downlink scheduling and aPDSCH corresponding to the PDCCH. For PUCCH format 3 transmission, atleast one of the PDCCH and the PDSCH may be received on an SCell.

As described with reference to FIGS. 32 to 33, multi-antenna (port)transmission (e.g., SORTD) requires orthogonal resources greater inamount than the amount of resources in single antenna (port)transmission. For example, 2Tx SORTD transmission requires orthogonalresources, the amount of which is twice the amount of resources insingle antenna (port) transmission. Accordingly, the antenna (port)transmission mode is associated with the number of UEs multiplexed in aresource region for the PUCCH, that is, multiplexing capacity.Accordingly, the BS needs to flexibly configure the antenna (port)transmission mode according to the number of UEs communicating with theBS. For example, if the number of UEs accepted by the BS is small,multi-antenna (port) transmission mode (e.g., SORTD mode) using multipleresources may be configured with respect to each UE and, if the numberof UEs accepted by the BS is large, a single antenna (port) transmissionmode using a single resource may be configured. The antenna (port)transmission mode for PUCCH transmission may be configured by RRCsignaling. In addition, the antenna (port) transmission mode may beindependently configured on a per PUCCH format basis.

Hereinafter, the present invention proposes various methods ofallocating resources (see step S3310 of FIG. 33) in an environment usingmultiple resources for multi-antenna (port) transmission in PUCCH format3. For example, if 2Tx SORTD is applied to PUCCH format 3, since twoorthogonal resources are necessary, there is a need for an allocationrule of two orthogonal resources.

First, single antenna (port) transmission requiring one orthogonalresource will be described. Resource allocation for PUCCH format 3 isbased on explicit resource allocation. More specifically, a UE may beexplicitly allocated PUCCH resource value candidates for PUCCH format 3(or PUCCH resource value candidate set) (e.g., n_(PUCCH,x) ⁽³⁾(x=0, 1, .. . , N)) through higher-layer (e.g., RRC) signaling in advance.Thereafter, a BS may transmit an ACK/NACK (A/N) resource indicator (ARI)(HARQ-ACK resource value) to the UE and the UE may determine a PUCCHresource value n_(PUCCH) ⁽³⁾ used for actual PUCCH transmission throughthe ARI. The PUCCH resource value n_(PUCCH) ⁽³⁾ is mapped to PUCCHresources (e.g., OC or PRB). The ARI may be used to directly indicatewhich of the PUCCH resource value candidate(s) (or which PUCCH resourcevalue candidate set) provided by the higher layer in advance will beused. In implementation, the ARI may indicate an offset value of thePUCCH resource value signaled (by the higher layer). A transmit powercontrol (TPC) field of a PDSCH-scheduling PDCCH (SCell PDCCH)transmitted on an SCell may be reused as the ARI. The TPC field of thePDSCH-scheduling PDCCH (PCell PDCCH) transmitted on a PCell may be usedfor PUCCH power control which is an original purpose thereof. In case of3GPP Rel-10, since the PDSCH of the PCell does not allow cross-carrierscheduling from the SCell, receiving the PDSCH only on the PCell may beequal to receiving the PDCCH only on the PCell.

More specifically, if PUCCH resource(s) for A/N are allocated by RRC inadvance, resources used for actual PUCCH transmission may be determinedas follows.

-   -   The PDCCH corresponding to the PDSCH on the SCell(s) (or the        PDCCH on the SCell(s) corresponding to the PDSCH) indicates one        of the PUCCH resource(s) configured by RRC using the ARI        (HARQ-ACK resource value).    -   If the PDCCH corresponding to the PDSCH on the SCell(s) (or the        PDCCH on the SCell(s) corresponding to the PDSCH) is not        detected and the PDSCH is received on the PCell, any one of the        following methods is applicable:    -   Implicit A/N PUCCH resource according to the existing 3GPP Rel-8        (that is, PUCCH format 1a/1b resource obtained using a lowest        CCE configuring the PDCCH) is used.    -   The PDCCH corresponding to the PDSCH on the PCell(s) (or the        PDCCH on the PCell(s) corresponding to the PDSCH) indicates one        of the PUCCH resource(s) configured by RRC using the ARI        (HARQ-ACK resource value).    -   It is assumed that all the PDCCHs corresponding to the PDSCHs on        the SCells (or the PDCCHs on the SCells corresponding to the        PDSCHs) have the same ARI (HARQ-ACK resource value).

The ARI (HARQ-ACK resource value) may have X bits and X may be 2 if theTPC field of the SCell PDCCH is reused. For convenience, it is assumedthat X=2.

Hereinafter, a resource allocation method for supporting various antenna(port) transmission modes if control information is transmitted usingPUCCH format 3 will be described.

For example, the UE may be allocated four orthogonal resources for PUCCHformat 3, for example, PUCCH resource values n_(PUCCH,0) ⁽³⁾,n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, and n_(PUCCH,3) ⁽³⁾ through RRCsignaling (e.g., four RRC signals). In addition, the UE may be allocatedone set {n_(PUCCH,0) ⁽³⁾, n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3)⁽³⁾} composed of four PUCCH resource values as one RRC signal.Thereafter, the UE may detect a PDCCH signal and receive a PDSCH signalcorresponding thereto. At least one of the PDCCH signal and the PDSCHsignal may be received through an SCell. Thereafter, the UE maydetermine the PUCCH resource value n_(PUCCH) ⁽³⁾ used for actual PUCCHtransmission according to the bit value of the ARI (HARQ-ACK resourcevalue) in the PDCCH signal. The determined PUCCH resource value ismapped to PUCCH resources (e.g., OC or PRB). A UCI (e.g., HARQ-ACK forPDSCH) is transmitted over a network (e.g., a BS or a relay node (RN))using the PUCCH resources to which the PUCCH resource value is mapped.The above-described methods are shown in Table 16.

TABLE 16 HARQ-ACK resource value for PUCCH (ARI) n_(PUCCH) ⁽³⁾ 00 FirstPUCCH resource value n_(PUCCH,0) ⁽³⁾ configured by higher layers 01Second PUCCH resource value n_(PUCCH,1) ⁽³⁾ configured by higher layers10 Third PUCCH resource value n_(PUCCH,2) ⁽³⁾ configured by higherlayers 11 Fourth PUCCH resource value n_(PUCCH,3) ⁽³⁾ configured byhigher layers

where, HARQ-ACK indicates a HARQ ACK/NACK/DTX response to a downlinktransport block. The HARQ ACK/NACK/DTX response includes ACK, NACK, DTXand NACK/DTX.

If it is assumed that the ARI (HARQ-ACK resource value) is transmittedusing the TPC field of the SCell PDCCH, if the UE receives the PDSCHonly on the PCell (receives the PDCCH only on the PCell), the ARI or thePUCCH resource value associated with the ARI is not recognized.Accordingly, if an event occurs, fall-back using the existing 3GPPRel-8/9 PUCCH resources and Rel-8/9 PUCCH format 1a/1b is applicable.

Next, a method of allocating a plurality of orthogonal resources fortransmit diversity (e.g., SORTD) will be described. For convenience, itis assumed that two orthogonal resources are used.

In the following description, a resource (set) additionally necessaryfor multi-antenna port transmission may be allocated in consideration ofUE capability or an actual transmission mode of the UE. For example, ifthe UE supports multi-antenna port transmission, the BS may allocate thesecond resource (set) for multi-antenna port transmission along with thefirst resource (set) for single antenna port transmission in advance.Thereafter, the UE may use the first resource (set) in the singleantenna port transmission mode and use the first resource (set) and thesecond resource (set) in the multi-antenna port transmission mode. Inaddition, the BS may allocate the second resource (set) formulti-antenna port transmission in consideration of the currenttransmission mode of the UE. For example, the BS may allocate the secondresource (set) for the UE after instructing the UE to operate in themulti-antenna port transmission mode. That is, the UE may beadditionally allocated the first resource (set) only after themulti-antenna port transmission mode is configured in a state in whichthe first resource (set) is allocated.

For example, the UE may basically receive allocation informationindicating a plurality of PUCCH resources for an antenna port p0 and mayadditionally receive allocation information indicating a plurality ofPUCCH resources for an antenna port p1 only when multi-antenna porttransmission is possible or the multi-antenna port transmission mode isconfigured.

In this case, the UE may be allocated eight orthogonal resources forPUCCH format 3, for example, PUCCH resource values n_(PUCCH,0) ⁽³⁾,n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3) ⁽³⁾, n_(PUCCH,4) ⁽³⁾,n_(PUCCH,5) ⁽³⁾, n_(PUCCH,6) ⁽³⁾, and n_(PUCCH,7) ⁽³⁾ through RRCsignals (e.g., eight RRC signals). In addition, the UE may be allocatedone set {n_(PUCCH,0) ⁽³⁾, n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3)⁽³⁾, n_(PUCCH,4) ⁽³⁾, n_(PUCCH,5) ⁽³⁾, n_(PUCCH,6) ⁽³⁾, n_(PUCCH,7) ⁽³⁾}composed of eight PUCCH resources values through one RRC signal.Thereafter, the UE may detect a PDCCH signal and a PDSCH correspondingthereto. At least one of the PDCCH signal and the PDSCH signal may bereceived through an SCell. Thereafter, the UE may determine the PUCCHresource value n_(PUCCH) ^((3,p)) used for actual PUCCH transmissionaccording to the bit value of the ARI (HARQ-ACK resource value) in thePDCCH signal. p denotes an antenna port number or a value associatedtherewith. The determined PUCCH resource value is mapped to PUCCHresources (e.g., OC or PRB). A UCI (e.g., HARQ-ACK for PDSCH) istransmitted over a network (e.g., a BS or a relay node (RN)) using thePUCCH resources to which the PUCCH resource value is mapped.

In the multi-antenna port transmission mode, one ARI is used to indicatea plurality of PUCCH resource values. The plurality of PUCCH resourcevalues indicated by the ARI is mapped to PUCCH resources for therespective antenna ports. Accordingly, the ARI may indicate one or aplurality of PUCCH resource values depending on whether the antenna porttransmission mode is a single antenna port mode or a multi-antenna portmode. The above-described method is shown in Table 17.

TABLE 17 HARQ-ACK resource n_(PUCCH) ^((3,p)) value (ARI) for PUCCH p =p0 (e.g., antenna port 0) p = p1 (e.g., antenna port 1) 00 First PUCCHresource value Fifth PUCCH resource value n_(PUCCH,0) ⁽³⁾ configured byhigher n_(PUCCH,4) ⁽³⁾ configured by higher layers layers 01 SecondPUCCH resource Sixth PUCCH resource value value n_(PUCCH,1) ⁽³⁾configured by n_(PUCCH,5) ⁽³⁾ configured by higher higher layers layers10 Third PUCCH resource value Seventh PUCCH resource n_(PUCCH,2) ⁽³⁾configured by higher value n_(PUCCH,6) ⁽³⁾ configured by layers higherlayers 11 Fourth PUCCH resource Eighth PUCCH resource value n_(PUCCH,3)⁽³⁾ configured by value n_(PUCCH,7) ⁽³⁾ configured by higher layershigher layers

As another example, the UE may be allocated four orthogonal resources(e.g., PUCCH resource values) through RRC signaling on a per antennaport basis as follows. Thereafter, the UE may detect a PDCCH signal andreceive a PDSCH signal corresponding thereto. At least one of the PDCCHsignal and the PDSCH signal may be received through an SCell.Thereafter, the UE may determine a final PUCCH resource value n_(PUCCH)^((3,p)) to be used on a per antenna port basis according to the bitvalue of the ARI (HARQ-ACK resource value) in the PDCCH signal. Thedetermined PUCCH resource value is mapped to PUCCH resources (e.g., OCor PRB) for each antenna port. p indicates an antenna port number or avalue associated therewith. This method is shown in Table 18.

-   -   n_(PUCCH,0) ^((3,0)), n_(PUCCH,1) ^((3,0)), n_(PUCCH,2)        ^((3,0)), n_(PUCCH,3) ^((3,0))-> used for antenna port p0 (e.g.,        p0=0)    -   n_(PUCCH,0) ^((3,1)), n_(PUCCH,1) ^((3,1)), n_(PUCCH,2)        ^((3,1)), n_(PUCCH,3) ^((3,1))-> used for antenna port p1 (e.g.,        p1=1)

Although not limited, as described above, the UE may basically receiveallocation information indicating a plurality of PUCCH resources for anantenna port p0 and may additionally receive allocation informationindicating a plurality of PUCCH resources for an antenna port p1 onlywhen multi-antenna port transmission is possible or the multi-antennaport transmission mode is configured.

TABLE 18 HARQ-ACK resource value n_(PUCCH) ^((3,p)) (ARI) for PUCCH p =p0 (e.g., antenna port 0) p = p1 (e.g., antenna port 1) 00 First PUCCHresource value First PUCCH resource value n_(PUCCH,0) ^((3,0))configured by higher n_(PUCCH,0) ^((3,1)) configured by higher layerslayers 01 Second PUCCH resource Second PUCCH resource value n_(PUCCH,1)^((3,0)) configured by value n_(PUCCH,1) ^((3,1)) configured by higherlayers higher layers 10 Third PUCCH resource value Third PUCCH resourcevalue n_(PUCCH,2) ^((3,0)) configured by higher n_(PUCCH,2) ^((3,1))configured by higher layers layers 11 Fourth PUCCH resource Fourth PUCCHresource value n_(PUCCH,3) ^((3,0)) configured by value n_(PUCCH,3)^((3,3)) configured by higher layers higher layers

The UE may be basically allocated four orthogonal resources for singleantenna port transmission, for example, PUCCH resource values{n_(PUCCH,0) ^((3,0)), n_(PUCCH,1) ^((3,0)), n_(PUCCH,2) ^((3,0)),n_(PUCCH,3) ^((3,0))} through one RRC signal and may be allocated eightorthogonal resources for two antenna ports, for example, PUCCH resourcevalues {n_(PUCCH,0) ^((3,0)), n_(PUCCH,1) ^((3,0)), n_(PUCCH,2)^((3,0)), n_(PUCCH,3) ^((3,0)), n_(PUCCH,0) ^((3,1)), n_(PUCCH,1)^((3,1)), n_(PUCCH,2) ^((3,1)), n_(PUCCH,3) ^((3,1))} through one RRCsignal if multi-antenna port transmission is possible or themulti-antenna port transmission mode is configured. The UE may determinethe final PUCCH resource value n_(PUCCH) ^((3,p)) to be used on a perantenna port basis and the PUCCH resource corresponding theretoaccording to the bit value of the ARI. The above-described method isshown in Table 19.

TABLE 19 HARQ-ACK resource value n_(PUCCH) ^((3,p)) (ARI) for PUCCH p =p0 (e.g., antenna port 0) p = p1 (e.g., antenna port 1) 00 First PUCCHresource value Fifth PUCCH resource value n_(PUCCH,0) ^((3,0))configured by higher n_(PUCCH,0) ^((3,1)) configured by higher layerslayers 01 Second PUCCH resource Sixth PUCCH resource value valuen_(PUCCH,1) ^((3,0)) configured by n_(PUCCH,1) ^((3,1)) configured byhigher higher layers layers 10 Third PUCCH resource value Seventh PUCCHresource n_(PUCCH,2) ^((3,0)) configured by higher value n_(PUCCH,2)^((3,1)) configured by layers higher layers 11 Fourth PUCCH resourceEighth PUCCH resource value n_(PUCCH,3) ^((3,0)) configured by valuen_(PUCCH,3) ^((3,3)) configured by higher layers higher layers

Tables 17 to 19 show the case where a part p=p0 of allocation of thePUCCH resource values for multiple antenna ports is configured to beequal to that in a single antenna port. That is, a nested structure isassumed in Tables 17 to 19. Accordingly, one common table may supportboth single antenna port transmission and multi-antenna porttransmission.

Referring to Table 18, the nested structure will be described in greaterdetail. In the nested structure, one common table may be used. Table 20shows a common table for the single antenna port transmission mode andthe multi-antenna port transmission mode.

TABLE 20 HARQ-ACK resource value (ARI) for PUCCH n_(PUCCH) ^((3,p)) 00First PUCCH resource value configured by higher layers 01 Second PUCCHresource value configured by higher layers 10 Third PUCCH resource valueconfigured by higher layers 11 Fourth PUCCH resource value configured byhigher layers

If the UE is configured to the single antenna port transmission mode inassociation with PUCCH transmission, Table 20 may be analyzed as Table21. Accordingly, if the UE is configured to the single antenna porttransmission mode, the PUCCH resource value n_(PUCCH) ^((3,p)) indicatedby the ARI is finally mapped to one PUCCH resource n_(PUCCH) ^((3,p0))for a single antenna port (e.g., p0).

TABLE 21 n_(PUCCH) ^((3,p)) 2 n_(PUCCH) ^((3,p)) (p = p0) 00 First PUCCHresource → n_(PUCCH,0) ^((3,p0)) value configured by higher layers 01Second PUCCH resource n_(PUCCH,1) ^((3,p0)) value configured by higherlayers 10 Third PUCCH resource n_(PUCCH,2) ^((3,p0)) value configured byhigher layers 11 Fourth PUCCH resource n_(PUCCH,3) ^((3,p0)) valueconfigured by higher layers

If the UE is configured to the multi-antenna port transmission mode inassociation with PUCCH transmission, Table 20 may be analyzed as Table22. Accordingly, if the UE is configured to the multi-antenna porttransmission mode, the PUCCH resource value n_(PUCCH) ^((3,p)) indicatedby the ARI is finally mapped to a plurality of PUCCH resources n_(PUCCH)^((3,p0)) and n_(PUCCH) ^((3,p1)) for multiple antenna ports (e.g., p0and p1).

TABLE 22 HARQ-ACK resource value (ARI) n_(PUCCH) ^((3,p)) n_(PUCCH)^((3,p)) for PUCCH n_(PUCCH) ^((3,p)) (p = p0) (p = p1) 00 First PUCCH →n_(PUCCH,0) ^((3,p0)) n_(PUCCH,0) ^((3,p1)) resource value configured byhigher layers 01 Second PUCCH n_(PUCCH,1) ^((3,p0)) n_(PUCCH,1)^((3,p1)) resource value configured by higher layers 10 Third PUCCHn_(PUCCH,2) ^((3,p0)) n_(PUCCH,2) ^((3,p1)) resource value configured byhigher layers 11 Fourth PUCCH n_(PUCCH,3) ^((3,p0)) n_(PUCCH,3)^((3,p1)) resource value configured by higher layers

As another example of allocating a plurality (e.g., two) of orthogonalresources for transmit diversity, that is, SORTD, will be described. Forexample, it is assumed that the UE is allocated four orthogonalresources for PUCCH format 3, for example, PUCCH resource valuesn_(PUCCH,0) ⁽³⁾, n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, and n_(PUCCH,3) ⁽³⁾through RRC signals (e.g., four RRC signals). Alternatively, it may beassumed that the UE is allocated one set {n_(PUCCH,0) ⁽³⁾, n_(PUCCH,1)⁽³⁾, n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3) ⁽³⁾} composed of four PUCCH resourcevalues through one RRC signal. As described above, the UE may determinea final PUCCH resource n_(PUCCH) ^((3,p)) to be used on a per antennaport basis according to the bit value of the ARI. On the aboveassumption, according to this example, four PUCCH resource values may bedivided into two groups of group0={n_(PUCCH,0) ⁽³⁾, n_(PUCCH,1) ⁽³⁾} andgroup1={n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3) ⁽³⁾}. In this case, one bit of thefront part and one bit of the back part of the ARI may be used toindicate resources for respective groups. For example, it is assumedthat the ARI is composed of b0 and b1 (each of b0 and b1 is 0 or 1). Inthis case, b0 indicates which of the PUCCH resource values is used inthe group 0 and b1 indicates which of the PUCCH resource values is usedin the group 1. The PUCCH resource value selected from the group 0 maybe mapped to the PUCCH resources (e.g., OC or PRB) for the antenna portp0 and the resource selected from group 1 may be mapped to the PUCCHresources (e.g., OC or PRB) for the antenna port p1.

The above-described method is shown in Table 23. Although this method isapplicable to the case where four PUCCH resource values n_(PUCCH,0) ⁽³⁾,n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾ and n_(PUCCH,3) ⁽³⁾ are allocated byRRC signaling, this method is applicable to the case where moreorthogonal resources are used.

TABLE 23 HARQ-ACK resource value n_(PUCCH) ^((3,p)) (ARI) for PUCCH p =p0 (e.g., antenna port 0) p = p1 (e.g., antenna port 1) 00 First PUCCHresource value Third PUCCH resource value n_(PUCCH,0) ⁽³⁾ for AP0configured n_(PUCCH,2) ⁽³⁾ for AP1 configured by higher layers by higherlayers 01 First PUCCH resource value Fourth PUCCH resource n_(PUCCH,0)⁽³⁾ for AP0 configured value n_(PUCCH,3) ⁽³⁾ for AP1 by higher layersconfigured by higher layers 10 Second PUCCH resource Third PUCCHresource value value n_(PUCCH,1) ⁽³⁾ for AP0 n_(PUCCH,2) ⁽³⁾ for AP1configured configured by higher layers by higher layers 11 Second PUCCHresource Fourth PUCCH resource value n_(PUCCH,1) ⁽³⁾ for AP0 valuen_(PUCCH,3) ⁽³⁾ for AP1 configured by higher layers configured by higherlayers

Table 23 shows the case where (in case of 2Tx, a total of four) signalsare received through two RRC signals per respective antennas and eachbit of the ARI indicates resources used for each antenna port. Table 24shows the case where {n_(PUCCH,0) ^((3,0)), n_(PUCCH,1) ^((3,0))} isallocated for the antenna port p0 and {n_(PUCCH,0) ^((3,1)), n_(PUCCH,1)^((3,1))} is allocated for the antenna port p1.

TABLE 24 HARQ-ACK resource value n_(PUCCH) ^((3,p)) (ARI) for PUCCH p =p0 (e.g., antenna port 0) p = p1 (e.g., antenna port 1) 00 First PUCCHresource value First PUCCH resource value n_(PUCCH,0) ^((3,0)) for theantenna port n_(PUCCH,0) ^((3,1)) for the antenna port 0 (AP0)configured by higher 1 (AP1) configured by higher layers layers 01 FirstPUCCH resource value Second PUCCH resource n_(PUCCH,0) ^((3,0)) for AP0configured value n_(PUCCH,1) ^((3,1)) for AP1 by higher layersconfigured by higher layers 10 Second PUCCH resource First PUCCHresource value value n_(PUCCH,1) ^((3,0)) for AP0 n_(PUCCH,0) ^((3,1))for AP1 configured configured by higher layers by higher layers 11Second PUCCH resource Second PUCCH resource value n_(PUCCH,1) ^((3,0))for AP0 value n_(PUCCH,1) ^((3,1)) for AP1 configured by higher layersconfigured by higher layers

As another embodiment of the present invention, a method of a downlinkassignment index in case of TDD CA will be described. The DAI is a valueobtained by counting scheduled PDCCHs in a time domain and is extensibleto a cell (or CC) domain in CA. In case of PUCCH format 3, since a DAIvalue is not necessary, the DAI may be used in the present invention.

For example, PUCCH format 3 resources for a first antenna port (p=p0)may be allocated/determined using an ARI and PUCCH format resource for asecond antenna port (p=p1) may be allocated/determined using a DAI.PDCCH(s) of a serving cell may be restricted to have the same DAI valuein preparation for the case where the PDCCH of at least one serving cellfails. If a PDSCH is scheduled only on a PCell, a UE may ignore a DAIvalue of a PCell PDCCH corresponding to the PDSCH, fall back to a singleantenna port mode, and transmit a PUCCH.

For convenience, it is assumed that the UE is allocated four orthogonalresources, for example, PUCCH resource values n_(PUCCH,0) ⁽³⁾,n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, and n_(PUCCH,3) ⁽³⁾ through RRCsignaling in advance. Thereafter, if it is assumed that the UE receivesa PDCCH signal including ARI=[00] and DAI=[10],

-   -   n_(PUCCH,0) ^((3,0))=n_(PUCCH,0) ⁽³⁾-> used for antenna port p0        (e.g., p0=0)    -   n_(PUCCH,0) ^((3,1))=n_(PUCCH,2) ⁽³⁾-> used for antenna port p1        (e.g., p1=1)

The above-described method is shown in Table 25.

TABLE 25 HARQ-ACK resource value (ARI) for DAI value PUCCH (used (usedfor n_(PUCCH) ^((3,p)) for p = p0) p = p1) p = p0 (e.g., antenna port 0)p = p1 (e.g., antenna port 1) 00 01 First PUCCH resource Second PUCCHresource value n_(PUCCH,0) ⁽³⁾ configured value n_(PUCCH,1) ⁽³⁾configured by higher layers by higher layers 00 10 First PUCCH resourceThird PUCCH resource value n_(PUCCH,0) ⁽³⁾ configured value n_(PUCCH,2)⁽³⁾ configured by higher layers by higher layers 00 11 First PUCCH valueFourth PUCCH resource n_(PUCCH,0) ⁽³⁾ configured by value n_(PUCCH,3)⁽³⁾ configured higher layers by higher layers 01 10 Second PUCCHresource Third PUCCH resource value n_(PUCCH,1) ⁽³⁾ configured valuen_(PUCCH,2) ⁽³⁾ configured by higher layers by higher layers 01 11Second PUCCH resource Fourth PUCCH resource value n_(PUCCH,1) ⁽³⁾configured value n_(PUCCH,3) ⁽³⁾ configured by higher layers by higherlayers 10 11 Third PUCCH resource Fourth PUCCH resource valuen_(PUCCH,2) ⁽³⁾ configured value n_(PUCCH,3) ⁽³⁾ configured by higherlayers by higher layers

In addition, the same method is applicable to the case where the UE isallocated eight orthogonal resources, for example, the PUCCH resourcevalues n_(PUCCH,0) ⁽³⁾, n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, n_(PUCCH,3)⁽³⁾, n_(PUCCH,4) ⁽³⁾, n_(PUCCH,5) ⁽³⁾, n_(PUCCH,6) ⁽³⁾, n_(PUCCH,7) ⁽³⁾,through RRC signaling in advance. For example, the ARI values 00, 01, 10and 11 for the antenna port 0 respectively indicate n_(PUCCH,0) ⁽³⁾,n_(PUCCH,1) ⁽³⁾, n_(PUCCH,2) ⁽³⁾, and n_(PUCCH,3) ⁽³⁾ and the DAI values00, 01, 10 and 11 for the antenna port 1 respectively indicaten_(PUCCH,4) ⁽³⁾, n_(PUCCH,5) ⁽³⁾, n_(PUCCH,6) ⁽³⁾, and n_(PUCCH,7) ⁽³⁾.

As another example, the UE may be allocated four orthogonal resourcesthrough RRC signaling on a per antenna port basis as follows.

-   -   n_(PUCCH,0) ^((3,0)), n_(PUCCH,1) ^((3,0)), n_(PUCCH,2)        ^((3,0)), n_(PUCCH,3) ^((3,0))-> used for the antenna port p0        (e.g., p0=0)    -   n_(PUCCH,0) ^((3,1)), n_(PUCCH,1) ^((3,1)), n_(PUCCH,2)        ^((3,1)), n_(PUCCH,3) ^((3,1))-> used for the antenna port p1        (e.g., p1=1)

At this time, the ARI values 00, 01, 10 and 11 respectively indicaten_(PUCCH,0) ^((3,0)) n_(PUCCH,1) ^((3,0)), n_(PUCCH,2) ^((3,0)) andn_(PUCCH,3) ^((3,0)) and DAI values 00, 01, 10 and 11 respectivelyindicate n_(PUCCH,0) ^((3,1)), n_(PUCCH,1) ^((3,1)), n_(PUCCH,2)^((3,1)), n_(PUCCH,3) ^((3,1)).

FIG. 34 is a diagram showing a BS and a UE applicable to the presentinvention.

Referring to FIG. 34, a wireless communication system includes a BS 110and a UE 120. The BS 110 includes a processor 112, a memory 114 and aradio frequency (RF) unit 116. The processor 112 may be configured toimplement the procedures and/or methods proposed by the presentinvention. The memory 114 is connected to the processor 112 so as tostore a variety of information associated with the operation of theprocessor 112. The RF unit 116 is connected to the processor 112 so asto transmit and/or receive a RF signal. The UE 120 includes a processor122, a memory 124 and a RF unit 126. The processor 122 may be configuredto implement the procedures and/or methods proposed by the presentinvention. The memory 124 is connected to the processor 122 so as tostore a variety of information associated with the operation of theprocessor 122. The RF unit 126 is connected to the processor 122 so asto transmit and/or receive a RF signal. The BS 110 and/or the UE 120 mayhave a single antenna or multiple antennas.

The aforementioned embodiments are achieved by combination of structuralelements and features of the present invention in a predetermined type.Each of the structural elements or features should be consideredselectively unless specified separately. Each of the structural elementsor features may be carried out without being combined with otherstructural elements or features. Also, some structural elements and/orfeatures may be combined with one another to constitute the embodimentsof the present invention. The order of operations described in theembodiments of the present invention may be changed. Some structuralelements or features of one embodiment may be included in anotherembodiment, or may be replaced with corresponding structural elements orfeatures of another embodiment. Moreover, it will be apparent that someclaims referring to specific claims may be combined with another claimsreferring to the other claims other than the specific claims toconstitute the embodiment or add new claims by means of amendment afterthe application is filed.

The embodiments of the present invention have been described based onthe data transmission and reception between the base station and theuser equipment. A specific operation which has been described as beingperformed by the base station may be performed by an upper node of thebase station as the case may be. In other words, it will be apparentthat various operations performed for communication with the userequipment in the network which includes a plurality of network nodesalong with the base station can be performed by the base station ornetwork nodes other than the base station. The base station may bereplaced with terms such as a fixed station, Node B, eNode B (eNB), andaccess point. Also, the user equipment may be replaced with terms suchas mobile station (MS) and mobile subscriber station (MSS).

The embodiments according to the present invention can be implemented byvarious means, for example, hardware, firmware, software, or theircombination. If the embodiment according to the present invention isimplemented by hardware, the embodiment of the present invention can beimplemented by one or more application specific integrated circuits(ASICs), digital signal processors (DSPs), digital signal processingdevices (DSPDs), programmable logic devices (PLDs), field programmablegate arrays (FPGAs), processors, controllers, microcontrollers,microprocessors, etc.

If the embodiment according to the present invention is implemented byfirmware or software, the embodiment of the present invention may beimplemented by a type of a module, a procedure, or a function, whichperforms functions or operations described as above. A software code maybe stored in a memory unit and then may be driven by a processor. Thememory unit may be located inside or outside the processor to transmitand receive data to and from the processor through various means whichare well known.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the inventions. Thus, itis intended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

INDUSTRIAL APPLICABILITY

The present invention is applicable to a terminal, a BS or anotherdevice of a wireless mobile communication system. More specifically, thepresent invention is applicable to a method and apparatus fortransmitting uplink control information.

What is claimed:
 1. A method for transmitting control information via aPhysical Uplink Control Channel (PUCCH) at a user equipment (UE) in aradio communication system, the method comprising: receiving a RadioResource Control (RRC) signal including a first set of PUCCH resourcesfor antenna port p0 and a second set of PUCCH resources for antenna portp1; detecting a Physical Downlink Control Channel (PDCCH) signalincluding a 2-bit Transmit Power Control (TPC) field and schedulinginformation; and determining two PUCCH resources for the antenna portsp0 and p1 by mapping a value of the 2-bit TPC field to a PUCCH resourcepair as shown in Table 1: TABLE 1 Value of PUCCH resources for antennaports p0 and p1, TPC field [n_(PUCCH) ^((3,p0)), n_(PUCCH) ^((3,p1))] 00first PUCCH resources, [n_(PUCCH,0) ^((3,p0)), n_(PUCCH,0) ^((3,p1))] 01second PUCCH resources, [n_(PUCCH,1) ^((3,p0)), n_(PUCCH,1) ^((3,p1))]10 third PUCCH resources, [n_(PUCCH,2) ^((3,p0)), n_(PUCCH,2) ^((3,p1))]11 fourth PUCCH resources, [n_(PUCCH,3) ^((3,p0)), n_(PUCCH,3)^((3,p1))]


2. The method of claim 1, further comprising transmitting controlinformation using the two PUCCH resources for the antenna ports p0 andp1.
 3. The method of claim 2, further comprising receiving a PhysicalDownlink Shared Channel (PDSCH) signal corresponding to the PDCCHsignal, wherein the control information includes Hybrid Automatic RepeatreQuest Acknowledgement (HARQ-ACK) for the PDSCH signal.
 4. The methodof claim 1, wherein the UE is configured with a two antenna porttransmission mode for PUCCH transmission.
 5. The method of claim 1,wherein the PUCCH includes a PUCCH format
 3. 6. A User Equipment (UE)configured to transmit control information via a Physical Uplink ControlChannel (PUCCH) in a radio communication system, the UE comprising: aradio frequency (RF) unit; and a processor, wherein the processor isconfigured to: receive a Radio Resource Control (RRC) signal including afirst set of PUCCH resources for antenna port p0 and a second set ofPUCCH resources for antenna port p1, detect a Physical Downlink ControlChannel (PDCCH) signal including a 2-bit Transmit Power Control (TPC)field and scheduling information, and determine two PUCCH resources forthe antenna ports p0 and p1 by mapping a value of the 2-bit TPC field toa PUCCH resource pair as shown in Table 1: TABLE 1 Value of PUCCHresources for antenna ports p0 and P1, TPC field [n_(PUCCH) ^((3,p0)),n_(PUCCH) ^((3,p1))] 00 first PUCCH resources, [n_(PUCCH,0) ^((3,p0)),n_(PUCCH,0) ^((3,p1))] 01 second PUCCH resources, [n_(PUCCH,1)^((3,p0)), n_(PUCCH,1) ^((3,p1))] 10 third PUCCH resources, [n_(PUCCH,2)^((3,p0)), n_(PUCCH,2) ^((3,p1))] 11 fourth PUCCH resources,[n_(PUCCH,3) ^((3,p0)), n_(PUCCH,3) ^((3,p1))]


7. The UE of claim 6, wherein the processor is further configured totransmit control information using the two PUCCH resources for theantenna ports p0 and p1.
 8. The UE of claim 7, wherein the processor isfurther configured to receive a Physical Downlink Shared Channel (PDSCH)signal corresponding to the PDCCH signal, wherein the controlinformation includes Hybrid Automatic Repeat reQuest Acknowledgement(HARQ-ACK) for the PDSCH signal.
 9. The UE of claim 6, wherein a twoantenna port transmission mode is configured for PUCCH transmission. 10.The UE of claim 6, wherein the PUCCH includes a PUCCH format
 3. 11. Amethod for receiving control information via a Physical Uplink ControlChannel (PUCCH) at a Base Station (BS) in a radio communication system,the method comprising: transmitting a Radio Resource Control (RRC)signal including a first set of PUCCH resources for antenna port p0 anda second set of PUCCH resources for antenna port p1; and transmitting aPhysical Downlink Control Channel (PDCCH) signal including a 2-bitTransmit Power Control (TPC) field and scheduling information, whereinthe value of the 2-bit TPC field is determined to allocate two PUCCHresources for the antenna ports p0 and p1 based on a mapping relation oftable 1: TABLE 1 Value of PUCCH resources for antenna ports p0 and p1,TPC field [n_(PUCCH) ^((3,p0)), n_(PUCCH) ^((3,p1))] 00 first PUCCHresources, [n_(PUCCH,0) ^((3,p0)), n_(PUCCH,0) ^((3,p1))] 01 secondPUCCH resources, [n_(PUCCH,1) ^((3,p0)), n_(PUCCH,1) ^((3,p1))] 10 thirdPUCCH resources, [n_(PUCCH,2) ^((3,p0)), n_(PUCCH,2) ^((3,p1))] 11fourth PUCCH resources, [n_(PUCCH,3) ^((3,p0)), n_(PUCCH,3) ^((3,p1))]


12. The method of claim 11, further comprising receiving controlinformation using the two PUCCH resources for the antenna ports p0 andp1.
 13. The method of claim 12, further comprising receiving a PhysicalDownlink Shared Channel (PDSCH) signal corresponding to the PDCCHsignal, wherein the control information includes Hybrid Automatic RepeatreQuest Acknowledgement (HARQ-ACK) for the PDSCH signal.
 14. The methodof claim 11, wherein the PUCCH includes a PUCCH format
 3. 15. A BaseStation (BS) configured to receive control information via a PhysicalUplink Control Channel (PUCCH) in a radio communication system, the BScomprising: a radio frequency (RF) unit; and a processor, wherein theprocessor is configured to: transmit a Radio Resource Control (RRC)signal including a first set of PUCCH resources for antenna port p0 anda second set of PUCCH resources for antenna port p1, and transmit aPhysical Downlink Control Channel (PDCCH) signal including a 2-bitTransmit Power Control (TPC) field and scheduling information, whereinthe value of the 2-bit TPC field is determined to allocate two PUCCHresources for the antenna ports p0 and p1 based on a mapping relation oftable 1: TABLE 1 Value of PUCCH resources for antenna ports p0 and P1,TPC field [n_(PUCCH) ^((3,p0)), n_(PUCCH) ^((3,p1))] 00 first PUCCHresources, [n_(PUCCH,0) ^((3,p0)), n_(PUCCH,0) ^((3,p1))] 01 secondPUCCH resources, [n_(PUCCH,1) ^((3,p0)), n_(PUCCH,1) ^((3,p1))] 10 thirdPUCCH resources, [n_(PUCCH,2) ^((3,p0)), n_(PUCCH,2) ^((3,p1))] 11fourth PUCCH resources, [n_(PUCCH,3) ^((3,p0)), n_(PUCCH,3) ^((3,p1))]


16. The BS of claim 15, wherein the processor is further configured toreceive control information using the two PUCCH resources for theantenna ports p0 and p1.
 17. The BS of claim 16, wherein the processoris further configured to receive a Physical Downlink Shared Channel(PDSCH) signal corresponding to the PDCCH signal, wherein the controlinformation includes Hybrid Automatic Repeat reQuest Acknowledgement(HARQ-ACK) for the PDSCH signal.
 18. The BS of claim 15, wherein thePUCCH includes a PUCCH format 3.